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<meta name="keywords" content="C0340375, aortic stenoses, subvalvular, aortic stenosis, subvalvular, aortic subvalvular stenoses, aortic subvalvular stenosis, disease or syndrome, narrowing of blood vessel below aortic heart valve, stenoses, aortic subvalvular, stenoses, subvalvular aortic, stenosis, aortic subvalvular, stenosis, subvalvular aortic, subaortic stenosis, subvalvar stenosis, subvalvular aortic stenoses, subvalvular aortic stenosis, subvalvular aortic stenosis, eisenberg type, subvalvular stenoses, aortic, subvalvular stenosis, subvalvular stenosis, aortic, autosomal dominant, autosomal recessive, birth defects, chromosomal disease, chromosome, clinical features, clinical findings, clinical genetics, clinical recommendations, clinvar, congenital chromosomal disease, consumer genetic resources, cytogenetic location, disease characteristics, disease definitions, disease descriptions, disease ontology, disease synonyms, disease vocabulary, dysmorphology, entrez, familial disease, gene, gene-disease relationship, genereviews, genetic disease, genetic disorder, genetic terminology, genetic testing registry, genetics home reference, genomic disease, gtr, hereditary disease, heritable disease, hpo, human phenotype ontology, inherited disease, management guidelines, maternal inheritance, medgen, medical genetics, medical subject headings, mesh, mitochondrial inheritance, mode of inheritance, national center for biotechnology information, national institutes of health, national library of medicine, ncbi, nih, nlm, omim, ordo, orphanet, paternal inheritance, phenome, position statements, professional practice guidelines, rare disease, reference sequence, refseq, snomed ct, syndrome, undiagnosed diseases, x-linked recessive" /><meta name="description" content="A fixed form of obstruction to blood flow across the left-ventricular outflow tract related to stenosis (narrowing) below the level of the aortic valve." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Subvalvular aortic stenosis (Concept Id: C0340375)
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<!--
UID=90950
ConceptID=C0340375
-->
<!--imgCountBooks = 0--><h1 class="medgenTitle"><div class="MedGenTitleText">Subvalvular aortic stenosis</div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>90950</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0340375</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonyms:</td>
<td>Subaortic stenosis; Subvalvular aortic stenosis, Eisenberg type</td></tr>
<tr><td><span class="bold">SNOMED CT: </span></td>
<td>Subaortic stenosis (204368006); Subvalvular stenosis (204368006); Subvalvar stenosis (204368006)</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>HPO:</td>
<td><a target="_blank" title="Human Phenotype Ontology" href="https://hpo.jax.org/app/browse/term/HP:0001682">HP:0001682</a></td></tr>
<tr><td>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0006987" target="_blank">MONDO:0006987</a></td></tr>
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<div class="portlet mgSection" id="ID_100">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Definition">Definition</h1><a sid="100" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln">A fixed form of obstruction to blood flow across the left-ventricular outflow tract related to stenosis (narrowing) below the level of the aortic valve. [from <a title="Human Phenotype Ontology" href="http://www.human-phenotype-ontology.org" class="defSource" target="_blank">HPO</a>]</div>
</div>
<div class="portlet mgSection" id="ID_118">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Term_Hierarchy">Term Hierarchy</h1><a sid="118" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln HierarchyGTR"><div class="jig-ncbitabs"><ul><li><a href="#tabGTR">GTR</a></li><li><a href="#tabMGEN">MeSH</a></li></ul><div id="tabGTR"><div class="search_result"><div class="rprts"><div class="chiclet_legend"><span class="chiclet_list" style="position:static;"><span title="Clinical test" class="chiclet Ccolor round">C</span><span>Clinical test,  </span><span title="Research test" class="chiclet Rcolor round">R</span><span>Research test,  </span><span title="OMIM" class="chiclet Ocolor ">O</span><span>OMIM,  </span><span title="GeneReview" class="chiclet Gcolor">G</span><span><em>GeneReviews</em>,  </span><span title="ClinVar" class="chiclet Vcolor">V</span><span>ClinVar  </span></span></div><div id="hierarchy" class="margin_t1"><div class="ds_tree"><ul><li class="matched_ds"><span class="TLline">Subvalvular aortic stenosis</span></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/116727" ref="tree=MeSH" title="MedGen record for Abnormality of the cardiovascular system">Abnormality of the cardiovascular system</a></span><ul><li><span class="TLline"><a href="/medgen/892473" ref="tree=MeSH" title="MedGen record for Abnormal cardiovascular system morphology">Abnormal cardiovascular system morphology</a></span><ul><li><span class="TLline"><a href="/medgen/6748" ref="tree=MeSH" title="MedGen record for Abnormal heart morphology">Abnormal heart morphology</a></span><ul><li><span class="TLline"><a href="/medgen/871266" ref="tree=MeSH" title="MedGen record for Abnormal cardiac ventricle morphology">Abnormal cardiac ventricle morphology</a></span><ul><li><span class="TLline"><a href="/medgen/91037" ref="tree=MeSH" title="MedGen record for Abnormal left ventricle morphology">Abnormal left ventricle morphology</a></span><ul><li><span class="TLline"><a href="/medgen/488871" ref="tree=MeSH" title="MedGen record for Abnormal left ventricular outflow tract morphology">Abnormal left ventricular outflow tract morphology</a></span><ul><li><span class="matched_ds">Subvalvular aortic stenosis</span><ul><li><span class="TLline"><a href="/medgen/3867" ref="tree=MeSH" title="MedGen record for Discrete subaortic stenosis">Discrete subaortic stenosis</a></span></li><li><span class="TLline"><a href="/medgen/2881" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy">Hypertrophic cardiomyopathy</a></span><ul><li><span class="TLline"><a href="/medgen/1671104" ref="tree=MeSH" title="MedGen record for Apical hypertrophic cardiomyopathy">Apical hypertrophic cardiomyopathy</a></span></li><li><span class="TLline"><a href="/medgen/104705" ref="tree=MeSH" title="MedGen record for Asymmetric septal hypertrophy">Asymmetric septal hypertrophy</a></span></li><li><span class="TLline"><a href="/medgen/68651" ref="tree=MeSH" title="MedGen record for Concentric hypertrophic cardiomyopathy">Concentric hypertrophic cardiomyopathy</a></span></li><li><span class="TLline"><a href="/medgen/183649" ref="tree=MeSH" title="MedGen record for Primary familial hypertrophic cardiomyopathy">Primary familial hypertrophic cardiomyopathy</a></span><ul><li><span class="TLline"><a href="/medgen/1648325" ref="tree=MeSH" title="MedGen record for Cardiomyopathy, familial hypertrophic 27">Cardiomyopathy, familial hypertrophic 27</a></span></li><li><span class="TLline"><a href="/medgen/864707" ref="tree=MeSH" title="MedGen record for Cardiomyopathy, hypertrophic, midventricular, digenic">Cardiomyopathy, hypertrophic, midventricular, digenic</a></span></li><li><span class="TLline"><a href="/medgen/501195" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 1">Hypertrophic cardiomyopathy 1</a></span></li><li><span class="TLline"><a href="/medgen/349383" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 2">Hypertrophic cardiomyopathy 2</a></span></li><li><span class="TLline"><a href="/medgen/349382" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 3">Hypertrophic cardiomyopathy 3</a></span></li><li><span class="TLline"><a href="/medgen/350526" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 4">Hypertrophic cardiomyopathy 4</a></span></li><li><span class="TLline"><a href="/medgen/331466" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 6">Hypertrophic cardiomyopathy 6</a></span></li><li><span class="TLline"><a href="/medgen/348695" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 7">Hypertrophic cardiomyopathy 7</a></span></li><li><span class="TLline"><a href="/medgen/324806" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 8">Hypertrophic cardiomyopathy 8</a></span></li><li><span class="TLline"><a href="/medgen/348780" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 9">Hypertrophic cardiomyopathy 9</a></span></li><li><span class="TLline"><a href="/medgen/331754" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 10">Hypertrophic cardiomyopathy 10</a></span></li><li><span class="TLline"><a href="/medgen/436962" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 11">Hypertrophic cardiomyopathy 11</a></span></li><li><span class="TLline"><a href="/medgen/393755" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 12">Hypertrophic cardiomyopathy 12</a></span></li><li><span class="TLline"><a href="/medgen/442487" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 13">Hypertrophic cardiomyopathy 13</a></span></li><li><span class="TLline"><a href="/medgen/442484" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 14">Hypertrophic cardiomyopathy 14</a></span></li><li><span class="TLline"><a href="/medgen/413312" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 15">Hypertrophic cardiomyopathy 15</a></span></li><li><span class="TLline"><a href="/medgen/462554" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 16">Hypertrophic cardiomyopathy 16</a></span></li><li><span class="TLline"><a href="/medgen/462614" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 17">Hypertrophic cardiomyopathy 17</a></span></li><li><span class="TLline"><a href="/medgen/462615" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 18">Hypertrophic cardiomyopathy 18</a></span></li><li><span class="TLline"><a href="/medgen/450078" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 19">Hypertrophic cardiomyopathy 19</a></span></li><li><span class="TLline"><a href="/medgen/462617" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 20">Hypertrophic cardiomyopathy 20</a></span></li><li><span class="TLline"><a href="/medgen/766356" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 21">Hypertrophic cardiomyopathy 21</a></span></li><li><span class="TLline"><a href="/medgen/934716" ref="tree=MeSH" title="MedGen record for Hypertrophic cardiomyopathy 26">Hypertrophic cardiomyopathy 26</a></span></li></ul></li></ul></li><li><span class="TLline"><a href="/medgen/336467" ref="tree=MeSH" title="MedGen record for Membranous subvalvular aortic stenosis">Membranous subvalvular aortic stenosis</a></span></li><li><span class="TLline"><a href="/medgen/854407" ref="tree=MeSH" title="MedGen record for Muscular subvalvular aortic stenosis">Muscular subvalvular aortic stenosis</a></span></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></div></div></div></div>
</div>
<div class="portlet mgSection" id="ID_112">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Conditions_with_this_feature">Conditions with this feature</h1><a sid="112" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln clinfeat">
<div class="divPopper rprt" id="rdis_140807"><div><strong>Encephalocraniocutaneous lipomatosis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>140807</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0406612</a></dd><dt><span class="dotprefix"></span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Encephalocraniocutaneous lipomatosis (ECCL) comprises a spectrum of predominantly congenital anomalies. In its typical form, ECCL is characterized by congenital anomalies of the skin (nevus psiloliparus, patchy or streaky non-scarring alopecia, subcutaneous lipomas in the frontotemporal region, focal skin aplasia or hypoplasia on the scalp, and/or small nodular skin tags on the eyelids or between the outer canthus and tragus), eye (choristoma), and brain (in particular intracranial and spinal lipomas). To a much lesser degree, the bones and the heart can be affected. About 40% of affected individuals have bilateral abnormalities of the skin or the eyes. About one third of affected individuals have normal cognitive development, another one third have mild developmental delay (DD) or intellectual disability (ID), and the final one third have severe or unspecified DD/ID. Half of individuals have seizures. Affected individuals are at an increased (i.e., above the general population) risk of developing brain tumors, particularly low-grade gliomas such as pilocytic astrocytomas. There is evidence that oculoectodermal syndrome (OES) may constitute a clinical spectrum with ECCL, with OES on the mild end and ECCL on the more severe end of the spectrum.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/140807">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_336609"><div><strong>Heterotaxy, visceral, 1, X-linked</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>336609</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1844020</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Heterotaxy&#13; Heterotaxy ('heter' meaning 'other' and 'taxy' meaning 'arrangement'), or situs ambiguus, is a developmental condition characterized by randomization of the placement of visceral organs, including the heart, lungs, liver, spleen, and stomach. The organs are oriented randomly with respect to the left-right axis and with respect to one another (Srivastava, 1997). Heterotaxy is a clinically and genetically heterogeneous disorder.&#13; Multiple Types of Congenital Heart Defects&#13; Congenital heart defects (CHTD) are among the most common congenital defects, occurring with an incidence of 8/1,000 live births. The etiology of CHTD is complex, with contributions from environmental exposure, chromosomal abnormalities, and gene defects. Some patients with CHTD also have cardiac arrhythmias, which may be due to the anatomic defect itself or to surgical interventions (summary by van de Meerakker et al., 2011).&#13; Reviews&#13; Obler et al. (2008) reviewed published cases of double-outlet right ventricle and discussed etiology and associations.&#13; Genetic Heterogeneity of Visceral Heterotaxy&#13; See also HTX2 (605376), caused by mutation in the CFC1 gene (605194) on chromosome 2q21; HTX3 (606325), which maps to chromosome 6q21; HTX4 (613751), caused by mutation in the ACVR2B gene (602730) on chromosome 3p22; HTX5 (270100), caused by mutation in the NODAL gene (601265) on chromosome 10q22; HTX6 (614779), caused by mutation in the CCDC11 gene (614759) on chromosome 18q21; HTX7 (616749), caused by mutation in the MMP21 gene (608416) on chromosome 10q26; HTX8 (617205), caused by mutation in the PKD1L1 gene (609721) on chromosome 7p12; HTX9 (618948), caused by mutation in the MNS1 gene (610766) on chromosome 15q21; HTX10 (619607), caused by mutation in the CFAP52 gene (609804) on chromosome 17p13; HTX11 (619608), caused by mutation in the CFAP45 gene (605152) on chromosome 1q23; HTX12 (619702), caused by mutation in the CIROP gene (619703) on chromosome 14q11; HTX13 (621079), caused by mutation in the DAND5 gene (609068) on chromosome 19p13; and HTX14 (621080), caused by mutation in the CIROZ gene (619700) on chromosome 1p36.&#13; Genetic Heterogeneity of Multiple Types of Congenital Heart Defects&#13; An X-linked form of CHTD, CHTD1, is caused by mutation in the ZIC3 gene on chromosome Xq26. CHTD2 (614980) is caused by mutation in the TAB2 gene (605101) on chromosome 6q25. A form of nonsyndromic congenital heart defects associated with cardiac rhythm and conduction disturbances (CHTD3; 614954) has been mapped to chromosome 9q31. CHTD4 (615779) is caused by mutation in the NR2F2 gene (107773) on chromosome 15q26. CHTD5 (617912) is caused by mutation in the GATA5 gene (611496) on chromosome 20q13. CHTD6 (613854) is caused by mutation in the GDF1 gene (602880) on chromosome 19p13. CHTD7 (618780) is caused by mutation in the FLT4 gene (136352) on chromosome 5q35. CHTD8 (619657) is caused by mutation in the SMAD2 gene (601366) on chromosome 18q21. CHTD9 (620294) is caused by mutation in the PLXND1 gene (604282) on chromosome 3q22.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/336609">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_341214"><div><strong>CHIME syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>341214</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1848392</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">CHIME syndrome, also known as Zunich neuroectodermal syndrome, is an extremely rare autosomal recessive multisystem disorder clinically characterized by colobomas, congenital heart defects, migratory ichthyosiform dermatosis, mental retardation, and ear anomalies (CHIME). Other clinical features include distinctive facial features, abnormal growth, genitourinary abnormalities, seizures, and feeding difficulties (summary by Ng et al., 2012). The disorder is caused by a defect in glycosylphosphatidylinositol (GPI) biosynthesis.&#13; For a discussion of genetic heterogeneity of GPI biosynthesis defects, see GPIBD1 (610293).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/341214">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_344425"><div><strong>3-methylglutaconic aciduria type 4</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>344425</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1855126</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">The category of 3-methylglutaconic aciduria type IV (MGCA4) represents a heterogeneous unclassified group of patients who share mild or intermittent urinary excretion of 3-methylglutaconic acid. MGCA excretion is a nonspecific finding observed in many other disorders caused by defects in mitochondrial energy metabolism (Gunay-Aygun, 2005).&#13; For a general phenotypic description and a discussion of genetic heterogeneity of 3-methylglutaconic aciduria, see MGCA1 (250950)</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/344425">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_341804"><div><strong>Heart defect - tongue hamartoma - polysyndactyly syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>341804</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1857587</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A rare, genetic, multiple congenital anomalies syndrome characterized by congenital heart defects (e.g. coarctation of the aorta with or without atrioventricular canal and subaortic stenosis), associated with tongue hamartomas, postaxial hand polydactyly and toe syndactyly.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/341804">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_349495"><div><strong>Atrial septal defect 1</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>349495</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1862389</a></dd><dt><span class="dotprefix"></span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Secundum atrial septal defect (ASD) is a common congenital heart malformation that occurs as an isolated anomaly in 10% of individuals with congenital heart disease. Uncorrected ASD can cause pulmonary overcirculation, right heart volume overload, and premature death (summary by Benson et al., 1998).&#13; Genetic Heterogeneity of Atrial Septal Defect&#13; The ASD1 locus has been mapped to chromosome 5p. Other forms of atrial septal defect that are associated with other congenital heart disease but no conduction defects or noncardiac abnormalities include ASD2 (607941), caused by mutation in the GATA4 gene (600576), and ASD4 (611363), caused by mutation in the TBX20 gene (606061). ASD3 (614089) and ASD5 (612794), in which atrial septal defect is not associated with other cardiac abnormalities, are caused by mutation in the MYH6 (160710) and ACTC1 (102540) genes, respectively. ASD6 (613087), in which atrial septal defect may be associated with aneurysm of the interatrial septum and cardiac arrhythmias, is caused by mutation in the TLL1 gene (606742). ASD7 (108900), in which ASD is often associated with atrioventricular conduction defects, is caused by mutation in the NKX2-5 gene (600584). ASD8 (614433), in which ASD may be associated with other cardiac anomalies, is caused by mutation in the CITED2 gene (602937). ASD9 (614475) is caused by mutation in the GATA6 gene (601656).&#13; Somatic mutations in the HAND1 gene (602406) have been identified in tissue samples from patients with ASDs.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/349495">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_419169"><div><strong>Chromosome 2q37 deletion syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>419169</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C2931817</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Patients with chromosome 2q37 deletion syndrome show highly variable clinical manifestations likely resulting from different deletion sizes and deletions of different genes. Variable clinical features included brachydactyly type E (BDE), affecting the metacarpals and metatarsals (in about 50% of patients), short stature, mild to moderate intellectual disability, behavioral abnormalities, and dysmorphic facial features. However, many individuals with deletions do not show cognitive deficits (summary by Villavicencio-Lorini et al., 2013, Wheeler et al., 2014, Jean-Marcais et al., 2015).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/419169">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_477726"><div><strong>Atrial septal defect 7</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>477726</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3276096</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">An extremely rare genetic congenital heart disease characterized by the presence of atrial septal defect, mostly of the ostium secundum type, associated with conduction anomalies like atrioventricular block, atrial fibrillation or right bundle branch block.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/477726">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_481473"><div><strong>Mosaic variegated aneuploidy syndrome 2</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>481473</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3279843</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Mosaic variegated aneuploidy syndrome is an autosomal recessive disorder characterized by poor growth and variable phenotypic manifestations, such as facial dysmorphism and congenital heart defects, associated with mosaic aneuploidies resulting from defects in cell division (summary by Snape et al., 2011).&#13; See also MVA1 (257300), caused by mutation in the BUB1B gene (602860) on chromosome 15q15.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/481473">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_501195"><div><strong>Hypertrophic cardiomyopathy 1</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>501195</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3495498</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Hypertrophic cardiomyopathy (HCM) is typically defined by the presence of unexplained left ventricular hypertrophy (LVH). Such LVH occurs in a non-dilated ventricle in the absence of other cardiac or systemic disease capable of producing the observed magnitude of increased LV wall thickness, such as pressure overload (e.g., long-standing hypertension, aortic stenosis) or storage/infiltrative disorders (e.g., Fabry disease, amyloidosis). The clinical manifestations of HCM range from asymptomatic LVH to progressive heart failure to sudden cardiac death (SCD), and vary from individual to individual even within the same family. Common symptoms include shortness of breath (particularly with exertion), chest pain, palpitations, orthostasis, presyncope, and syncope. Most often the LVH of HCM becomes apparent during adolescence or young adulthood, although it may also develop late in life, in infancy, or in childhood.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/501195">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_767193"><div><strong>Congenital heart defects, multiple types, 2</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>767193</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3554279</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Multiple types of congenital heart defects-2 (CHTD2) is characterized by variable congenital heart defects, primarily involving the valves, but also including septal defects or aneurysms, and complex defects such as tetralogy of Fallot. Dilated cardiomyopathy and myocardial noncompaction have been reported in some patients. In addition, some affected individuals exhibit facial dysmorphism and features of connective tissue disease (Thienpont et al., 2010; Ackerman et al., 2016; Ritelli et al., 2018).&#13; For a discussion of genetic heterogeneity of CHTD, see 306955.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/767193">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_899946"><div><strong>Singleton-Merten syndrome 1</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>899946</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4225427</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Singleton-Merten syndrome (SGMRT) is an uncommon autosomal dominant disorder characterized by abnormalities of blood vessels, teeth, and bone. Calcifications of the aorta and aortic and mitral valves occur in childhood or puberty and can lead to early death. Dental findings include delayed primary tooth exfoliation and permanent tooth eruption, truncated tooth root formation, early-onset periodontal disease, and severe root and alveolar bone resorption associated with dysregulated mineralization, leading to tooth loss. Osseous features consist of osteoporosis, either generalized or limited to distal extremities, distal limb osteolysis, widened medullary cavities, and easy tearing of tendons from bone. Less common features are mild facial dysmorphism (high anterior hair line, broad forehead, smooth philtrum, thin upper vermilion border), generalized muscle weakness, psoriasis, early-onset glaucoma, and recurrent infections. The disorder manifests with variable inter- and intrafamilial phenotypes (summary by Rutsch et al., 2015).&#13; Genetic Heterogeneity of Singleton-Merten Syndrome&#13; An atypical form of Singleton-Merten syndrome (SGMRT2; 616298) is caused by mutation in the DDX58 gene (609631) on chromosome 9p21.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/899946">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1631694"><div><strong>LEOPARD syndrome 1</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1631694</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4551484</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Noonan syndrome with multiple lentigines (NSML) is a condition in which the cardinal features consist of lentigines, hypertrophic cardiomyopathy, short stature, pectus deformity, and dysmorphic facial features including widely spaced eyes and ptosis. Multiple lentigines present as dispersed flat, black-brown macules, mostly on the face, neck, and upper part of the trunk with sparing of the mucosa. In general, lentigines do not appear until age four to five years but then increase to the thousands by puberty. Some individuals with NSML do not exhibit lentigines. Approximately 85% of affected individuals have heart defects, including hypertrophic cardiomyopathy (typically appearing during infancy and sometimes progressive) and pulmonary valve stenosis. Postnatal growth restriction resulting in short stature occurs in fewer than 50% of affected persons, although most affected individuals have a height that is less than the 25th centile for age. Sensorineural hearing deficits, present in approximately 20% of affected individuals, are poorly characterized. Intellectual disability, typically mild, is observed in approximately 30% of persons with NSML.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1631694">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1794157"><div><strong>Myasthenic syndrome, congenital, 7B, presynaptic, autosomal recessive</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1794157</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C5561947</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Autosomal recessive presynaptic congenital myasthenic syndrome-7B (CMS7B) is characterized by severe generalized muscle weakness apparent from birth; decreased fetal movements may be apparent in utero. Affected infants have generalized hypotonia with poor cry and feeding, head lag, and facial muscle weakness with ptosis. Some patients may have respiratory involvement. Electrophysiologic studies show decreased compound muscle action potentials (CMAPs) and a decremental response to repetitive nerve stimulation. Treatment with 3,4-diaminopyridine and pyridostigmine may result in clinical improvement (summary by Bauche et al., 2020).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1794157">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1794184"><div><strong>Neurodevelopmental disorder with hypotonia and dysmorphic facies</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1794184</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C5561974</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Neurodevelopmental disorder with hypotonia and dysmorphic facies (NEDHYDF) is characterized by global developmental delay and hypotonia apparent from birth. Affected individuals have variably impaired intellectual development, often with speech delay and delayed walking. Seizures are generally not observed, although some patients may have single seizures or late-onset epilepsy. Most patients have prominent dysmorphic facial features. Additional features may include congenital cardiac defects (without arrhythmia), nonspecific renal anomalies, joint contractures or joint hyperextensibility, dry skin, and cryptorchidism. There is significant phenotypic variability in both the neurologic and extraneurologic manifestations (summary by Tan et al., 2022).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1794184">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1823968"><div><strong>Liver disease, severe congenital</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1823968</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C5774195</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Severe congenital liver disease (SCOLIV) is an autosomal recessive disorder characterized by the onset of progressive hepatic dysfunction usually in the first years of life. Affected individuals show feeding difficulties with failure to thrive and features such as jaundice, hepatomegaly, and abdominal distension. Laboratory workup is consistent with hepatic insufficiency and may also show coagulation defects, anemia, or metabolic disturbances. Cirrhosis and hypernodularity are commonly observed on liver biopsy. Many patients die of liver failure in early childhood (Moreno Traspas et al., 2022).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1823968">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1823999"><div><strong>Cardiac valvular dysplasia 2</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1823999</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C5774226</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Cardiac valvular dysplasia-2 (CVDP2) is characterized primarily by congenital stenosis and insufficiency of the semilunar valves, although mild insufficiency of the atrioventricular valves has been observed as well. Other features include subaortic stenosis and dilation of the ascending aorta and/or pulmonary artery in some patients (Wunnemann et al., 2020; Massadeh et al., 2020).&#13; For a discussion of genetic heterogeneity of CVDP, see CVDP1 (212093).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1823999">Condition Record</a></div></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_344425" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">3-methylglutaconic aciduria type 4</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_349495" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Atrial septal defect 1</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_477726" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Atrial septal defect 7</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1823999" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cardiac valvular dysplasia 2</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_341214" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">CHIME syndrome</a></div><div class="jig-moreless" data-jigconfig="class: 'moveDown', moreText: 'See full list (17)', lessText: 'Show less', nodeBefore: 0"><span id="clinMore">
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_419169" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Chromosome 2q37 deletion syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_767193" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Congenital heart defects, multiple types, 2</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_140807" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Encephalocraniocutaneous lipomatosis</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_341804" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Heart defect - tongue hamartoma - polysyndactyly syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_336609" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Heterotaxy, visceral, 1, X-linked</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_501195" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypertrophic cardiomyopathy 1</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1631694" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">LEOPARD syndrome 1</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1823968" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Liver disease, severe congenital</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_481473" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Mosaic variegated aneuploidy syndrome 2</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1794157" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Myasthenic syndrome, congenital, 7B, presynaptic, autosomal recessive</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1794184" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Neurodevelopmental disorder with hypotonia and dysmorphic facies</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_899946" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Singleton-Merten syndrome 1</a></div></span></div></div>
</div>
<div class="portlet mgSection" id="ID_105">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Professional_guidelines">Professional guidelines</h1><a sid="105" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">PubMed<a class="help jig-ncbi-popper" data-jig="ncbipopper" href="#guidelinesHelpPM"><img class="pulldown" src="//static.pubmed.gov/portal/portal3rc.fcgi/4223267/img/4204968" /></a></h3>
<div class="nl"><a target="_blank" href="/pubmed/8020319">Transaortic resection of the subaortic membrane. Treatment for subvalvular aortic stenosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Jacobs JP,
Palatianos GM,
Cintron JR,
Kaiser GA</span><br />
<span class="medgenPMjournal">Chest</span>
1994 Jul;106(1):46-51.
doi: 10.1378/chest.106.1.46.
<span class="bold">PMID: </span><a href="/pubmed/8020319" target="_blank">8020319</a></div>
<div class="nl"><a target="_blank" href="/pubmed/14314491">RESULTS OF SURGICAL TREATMENT OF PATIENTS WITH DIFFUSE SUBVALVULAR AORTIC STENOSIS.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">FRYE RL,
KINCAID OW,
SWAN HJ,
KIRKLIN JW</span><br />
<span class="medgenPMjournal">Circulation</span>
1965 Jul;32:52-7.
doi: 10.1161/01.cir.32.1.52.
<span class="bold">PMID: </span><a href="/pubmed/14314491" target="_blank">14314491</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=(%22subvalvular%20aortic%20stenosis%22%5Btiab%3A~0%5D)%20AND%20(%22english%20and%20humans%22%5BFilter%5D)%20AND%20(%20(%22practice%20guideline%22%5BFilter%5D)%20OR%20(practice*%5Btitl%5D%20AND%20(guideline%5Btitl%5D%20OR%20parameter%5Btitl%5D%20OR%20resource%5Btitl%5D%20OR%20bulletin%5Btitl%5D%20OR%20best%5Btitl%5D))%20OR%20(genetic*%5Btitl%5D%20AND%20(evaluation%5Btitl%5D%20OR%20counseling%5Btitl%5D%20OR%20screening%5Btitl%5D%20OR%20test*%5Btitl%5D))%20OR%20(clinical%5Btitl%5D%20AND%20((expert%5Btitl%5D%20AND%20consensus%5Btitl%5D)%20OR%20utility%5Btitl%5D%20OR%20guideline*%5Btitl%5D))%20OR%20(management%5Btitl%5D%20AND%20(clinical%5Btitl%5D%20OR%20diagnos*%5Btitl%5D%20OR%20recommendation%5Btitl%5D%20OR%20pain%5Btitl%5D%20OR%20surveillance%5Btitl%5D%20OR%20emergency%5Btitl%5D%20OR%20guideline*%5Btitl%5D%20OR%20therap*))%20OR%20(treatment%5Btitl%5D%20AND%20((evaluation%5Btitl%5D%20AND%20diagnosis%5Btitl%5D)%20OR%20(assessment%5Btitl%5D%20AND%20prevention%5Btitl%5D)%20OR%20therap*))%20OR%20(Diagnos*%5Btitl%5D%20AND%20(prenatal%5Btitl%5D%20OR%20treatment%5Btitl%5D%20OR%20follow-up%5Btitl%5D%20OR%20statement%5Btitl%5D%20OR%20criteria%5Btitl%5D%20OR%20newborn%5Btitl%5D%20OR%20differential%5Btitl%5D%20OR%20neonatal%5Btitl%5D%20OR%20neonate%5Btitl%5D))%20OR%20(guideline*%5Btitl%5D%20AND%20(pharmacogenetic*%5Btitl%5D%20OR%20recommendation%5Btitl%5D%20OR%20therap*%5Btitl%5D%20OR%20evidence-based%5Btitl%5D%20OR%20consensus%5Btitl%5D%20OR%20(technical%5Btitl%5D%20AND%20standard*%5Btitl%5D)%20OR%20(molecular%5Btitl%5D%20AND%20testing%5Btitl%5D)))%20OR%20(risk%5Btitl%5D%20AND%20assessment%5Btitl%5D)%20OR%20(recommendation*%5Btitl%5D%20AND%20(statement%5Btitl%5D%20OR%20Evidence-based%5Btitl%5D%20OR%20Consensus%5Btitl%5D))%20OR%20(care%20AND%20((Patient%5Btitl%5D%20AND%20standard*%5Btitl%5D)%20OR%20primary%5Btitl%5D%20OR%20psychosocial%5Btitl%5D))%20OR%20(Health%5Btitl%5D%20AND%20supervision%5Btitl%5D)%20OR%20(statement%5Btitl%5D%20AND%20(policy%5Btitl%5D%20OR%20position%5Btitl%5D%20OR%20Consensus%5Btitl%5D))%20OR%20(pharmacogenetics%5Btitl%5D%20AND%20(Dosing%5Btitl%5D%20OR%20therap*%5Btitl%5D%20OR%20genotype*%5Btitl%5D%20OR%20drug*%5Btitl%5D))%20OR%20(Chemotherapy%5Btitl%5D%20AND%20decision*%5Btitl%5D)%20OR%20(screening%5Btitl%5D%20AND%20(newborn%5Btitl%5D%20OR%20neonat*%5Btitl%5D%20OR%20detection%5Btitl%5D%20OR%20diagnos*%5Btitl%5D))%20OR%20(criteria%5Btitl%5D%20OR%20genotype*%5Btitl%5D)%20)%20NOT%20(%22Case%20reports%22%5BPublication%20type%5D%20OR%20%22clinical%20study%22%5BPublication%20Type%5D%20OR%20%22randomized%20controlled%20trial%22%5BPublication%20Type%5D)" title="PubMed search">See all (2)</a></div></div>
</div>
<div class="display-none help-popup" id="guidelinesHelpPM">These guidelines are articles in PubMed that match specific search criteria developed by MedGen to capture the most relevant practice guidelines. This list may not be comprehensive and may include broader topics as well. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div><div class="display-none help-popup" id="guidelinesHelpCurated">These guidelines are manually curated by the MedGen team
to supplement articles available in PubMed. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div>
<div class="portlet mgSection" id="ID_103">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Recent_clinical_studies">Recent clinical studies</h1><a sid="103" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">Etiology</h3>
<div class="nl"><a target="_blank" href="/pubmed/39937710">The Konno-Rastan Procedure in the Current Era: Still A Feasible Option?</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Alpat S,
Sabuncu T,
Aydin A,
Guvener M,
Dogan R,
Yilmaz M</span><br />
<span class="medgenPMjournal">Braz J Cardiovasc Surg</span>
2025 Feb 12;40(1):e20240002.
doi: 10.21470/1678-9741-2024-0002.
<span class="bold">PMID: </span><a href="/pubmed/39937710" target="_blank">39937710</a><a href="/pmc/articles/PMC11815901" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/34839837">Long-term follow-up of subvalvular aortic stenosis in children: a single-centre experience.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Ramoğlu MG,
Karagözlü S,
Uçar T,
Eyileten Z,
Uysalel A,
Atalay S,
Tutar E</span><br />
<span class="medgenPMjournal">Cardiol Young</span>
2022 Jun;32(6):980-987.
Epub 2021 Nov 29
doi: 10.1017/S1047951121004686.
<span class="bold">PMID: </span><a href="/pubmed/34839837" target="_blank">34839837</a></div>
<div class="nl"><a target="_blank" href="/pubmed/15283359">Left ventricular outflow tract obstruction.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Lupinetti FM</span><br />
<span class="medgenPMjournal">Semin Thorac Cardiovasc Surg Pediatr Card Surg Annu</span>
2004;7:102-6.
doi: 10.1053/j.pcsu.2004.02.021.
<span class="bold">PMID: </span><a href="/pubmed/15283359" target="_blank">15283359</a></div>
<div class="nl"><a target="_blank" href="/pubmed/12371010">Subaortic stenosis: at risk substrates and treatment strategies.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Van Arsdell G,
Tsoi K</span><br />
<span class="medgenPMjournal">Cardiol Clin</span>
2002 Aug;20(3):421-9.
doi: 10.1016/s0733-8651(02)00013-9.
<span class="bold">PMID: </span><a href="/pubmed/12371010" target="_blank">12371010</a></div>
<div class="nl"><a target="_blank" href="/pubmed/949032">Phentolamine.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Gould L,
Reddy CV</span><br />
<span class="medgenPMjournal">Am Heart J</span>
1976 Sep;92(3):397-402.
doi: 10.1016/s0002-8703(76)80121-4.
<span class="bold">PMID: </span><a href="/pubmed/949032" target="_blank">949032</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Subvalvular%20aortic%20stenosis%22%20AND%20Etiology%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (145)</a></div><h3 class="subhead">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/36562380">Intra-cardiac echocardiography in diagnosis of subvalvular right-sided atrioventricular valve stenosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Ho CB,
Vejlstrup NG,
Schmidt MR,
Sondergaard L</span><br />
<span class="medgenPMjournal">Eur Heart J Cardiovasc Imaging</span>
2023 Jan 23;24(2):e35.
doi: 10.1093/ehjci/jeac256.
<span class="bold">PMID: </span><a href="/pubmed/36562380" target="_blank">36562380</a></div>
<div class="nl"><a target="_blank" href="/pubmed/28833554">Unrecognized subvalvular aortic stenosis: Lessons, insights, and solutions.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Varadarajan P,
Pai RG</span><br />
<span class="medgenPMjournal">Echocardiography</span>
2017 Aug;34(8):1120-1121.
doi: 10.1111/echo.13634.
<span class="bold">PMID: </span><a href="/pubmed/28833554" target="_blank">28833554</a></div>
<div class="nl"><a target="_blank" href="/pubmed/26731888">Subvalvular Aortic Stenosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Barekatain A,
Fanari Z,
Hammami S,
Qureshi W</span><br />
<span class="medgenPMjournal">Del Med J</span>
2015 Nov;87(11):346-8.
<span class="bold">PMID: </span><a href="/pubmed/26731888" target="_blank">26731888</a></div>
<div class="nl"><a target="_blank" href="/pubmed/6538823">Discrete subaortic stenosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Chaikhouni A,
Crawford FA Jr,
Sade RM,
Taylor AB,
Riopel DA,
Hohn AR</span><br />
<span class="medgenPMjournal">Clin Cardiol</span>
1984 May;7(5):289-93.
doi: 10.1002/clc.4960070507.
<span class="bold">PMID: </span><a href="/pubmed/6538823" target="_blank">6538823</a></div>
<div class="nl"><a target="_blank" href="/pubmed/949032">Phentolamine.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Gould L,
Reddy CV</span><br />
<span class="medgenPMjournal">Am Heart J</span>
1976 Sep;92(3):397-402.
doi: 10.1016/s0002-8703(76)80121-4.
<span class="bold">PMID: </span><a href="/pubmed/949032" target="_blank">949032</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Subvalvular%20aortic%20stenosis%22%20AND%20Diagnosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (247)</a></div><h3 class="subhead">Therapy</h3>
<div class="nl"><a target="_blank" href="/pubmed/25336218">Lipid laden in the true sense.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Lohiya RV,
Phadke M,
Lanjewar C,
Kerkar P</span><br />
<span class="medgenPMjournal">Eur Heart J</span>
2015 Jan 1;36(1):49.
Epub 2014 Oct 21
doi: 10.1093/eurheartj/ehu414.
<span class="bold">PMID: </span><a href="/pubmed/25336218" target="_blank">25336218</a></div>
<div class="nl"><a target="_blank" href="/pubmed/6995039">Verapamil therapy: a new approach to pharmacologic treatment of hypertrophic cardiomyopathy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Rosing DR,
Kent KM,
Maron BJ,
Condit J,
Epstein SE</span><br />
<span class="medgenPMjournal">Chest</span>
1980 Jul;78(1 Suppl):239-47.
doi: 10.1378/chest.78.1_supplement.239.
<span class="bold">PMID: </span><a href="/pubmed/6995039" target="_blank">6995039</a></div>
<div class="nl"><a target="_blank" href="/pubmed/565899">Propranolol and parturition.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Datta S,
Kitzmiller JL,
Ostheimer GW,
Schoenbaum SC</span><br />
<span class="medgenPMjournal">Obstet Gynecol</span>
1978 May;51(5):577-81.
doi: 10.1097/00006250-197805000-00015.
<span class="bold">PMID: </span><a href="/pubmed/565899" target="_blank">565899</a></div>
<div class="nl"><a target="_blank" href="/pubmed/949032">Phentolamine.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Gould L,
Reddy CV</span><br />
<span class="medgenPMjournal">Am Heart J</span>
1976 Sep;92(3):397-402.
doi: 10.1016/s0002-8703(76)80121-4.
<span class="bold">PMID: </span><a href="/pubmed/949032" target="_blank">949032</a></div>
<div class="nl"><a target="_blank" href="/pubmed/5212354">Long-term propranolol therapy in muscular subaortic stenosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Adelman AG,
Shah PM,
Gramiak R,
Wigle ED</span><br />
<span class="medgenPMjournal">Br Heart J</span>
1970 Nov;32(6):804-11.
doi: 10.1136/hrt.32.6.804.
<span class="bold">PMID: </span><a href="/pubmed/5212354" target="_blank">5212354</a><a href="/pmc/articles/PMC487418" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Subvalvular%20aortic%20stenosis%22%20AND%20Therapy%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (47)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/39937710">The Konno-Rastan Procedure in the Current Era: Still A Feasible Option?</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Alpat S,
Sabuncu T,
Aydin A,
Guvener M,
Dogan R,
Yilmaz M</span><br />
<span class="medgenPMjournal">Braz J Cardiovasc Surg</span>
2025 Feb 12;40(1):e20240002.
doi: 10.21470/1678-9741-2024-0002.
<span class="bold">PMID: </span><a href="/pubmed/39937710" target="_blank">39937710</a><a href="/pmc/articles/PMC11815901" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/34839837">Long-term follow-up of subvalvular aortic stenosis in children: a single-centre experience.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Ramoğlu MG,
Karagözlü S,
Uçar T,
Eyileten Z,
Uysalel A,
Atalay S,
Tutar E</span><br />
<span class="medgenPMjournal">Cardiol Young</span>
2022 Jun;32(6):980-987.
Epub 2021 Nov 29
doi: 10.1017/S1047951121004686.
<span class="bold">PMID: </span><a href="/pubmed/34839837" target="_blank">34839837</a></div>
<div class="nl"><a target="_blank" href="/pubmed/29377232">Subvalvular aortic stenosis: a review of current literature.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Devabhaktuni SR,
Chakfeh E,
Malik AO,
Pengson JA,
Rana J,
Ahsan CH</span><br />
<span class="medgenPMjournal">Clin Cardiol</span>
2018 Jan;41(1):131-136.
Epub 2018 Jan 29
doi: 10.1002/clc.22775.
<span class="bold">PMID: </span><a href="/pubmed/29377232" target="_blank">29377232</a><a href="/pmc/articles/PMC6489749" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/25378361">Paediatric subvalvular aortic stenosis: a systematic review and meta-analysis of natural history and surgical outcome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Etnel JR,
Takkenberg JJ,
Spaans LG,
Bogers AJ,
Helbing WA</span><br />
<span class="medgenPMjournal">Eur J Cardiothorac Surg</span>
2015 Aug;48(2):212-20.
Epub 2014 Nov 5
doi: 10.1093/ejcts/ezu423.
<span class="bold">PMID: </span><a href="/pubmed/25378361" target="_blank">25378361</a></div>
<div class="nl"><a target="_blank" href="/pubmed/24151775">Congenital discrete subaortic stenosis in pregnancy: case report and literature review.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Guglin M,
Kristof-Kuteyeva O</span><br />
<span class="medgenPMjournal">J Heart Valve Dis</span>
2013 May;22(3):439-44.
<span class="bold">PMID: </span><a href="/pubmed/24151775" target="_blank">24151775</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Subvalvular%20aortic%20stenosis%22%20AND%20Prognosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (122)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/28967205">Surgical strategies and outcomes of congenital supravalvular aortic stenosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Liu H,
Gao B,
Sun Q,
Du X,
Pan Y,
Zhu Z,
He X,
Zheng J</span><br />
<span class="medgenPMjournal">J Card Surg</span>
2017 Oct;32(10):652-658.
Epub 2017 Oct 1
doi: 10.1111/jocs.13213.
<span class="bold">PMID: </span><a href="/pubmed/28967205" target="_blank">28967205</a></div>
<div class="nl"><a target="_blank" href="/pubmed/25378361">Paediatric subvalvular aortic stenosis: a systematic review and meta-analysis of natural history and surgical outcome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Etnel JR,
Takkenberg JJ,
Spaans LG,
Bogers AJ,
Helbing WA</span><br />
<span class="medgenPMjournal">Eur J Cardiothorac Surg</span>
2015 Aug;48(2):212-20.
Epub 2014 Nov 5
doi: 10.1093/ejcts/ezu423.
<span class="bold">PMID: </span><a href="/pubmed/25378361" target="_blank">25378361</a></div>
<div class="nl"><a target="_blank" href="/pubmed/23456292">Evaluation of subvalvular aortic stenosis in children: a 16-year single-center experience.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Uysal F,
Bostan OM,
Signak IS,
Semizel E,
Cil E</span><br />
<span class="medgenPMjournal">Pediatr Cardiol</span>
2013 Aug;34(6):1409-14.
Epub 2013 Mar 2
doi: 10.1007/s00246-013-0664-x.
<span class="bold">PMID: </span><a href="/pubmed/23456292" target="_blank">23456292</a></div>
<div class="nl"><a target="_blank" href="/pubmed/6540248">Bacterial endocarditis of the aortic valve associated with diaphragmatic sub-aortic stenosis--account of two operated cases.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Vosa C,
Arciprete P,
Bellitti R,
Agozzino L,
Cotrufo M</span><br />
<span class="medgenPMjournal">Int J Cardiol</span>
1984 Jul;6(1):84-6.
doi: 10.1016/0167-5273(84)90251-1.
<span class="bold">PMID: </span><a href="/pubmed/6540248" target="_blank">6540248</a></div>
<div class="nl"><a target="_blank" href="/pubmed/6686258">Echocardiographic observations in a case of discrete membranous subaortic stenosis with a stenotic bicuspid aortic valve--a pre- and post-operative study (a case report).</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Kulkarni DR,
Pinto IJ,
Shah NA</span><br />
<span class="medgenPMjournal">J Postgrad Med</span>
1983 Jul;29(3):177-80.
<span class="bold">PMID: </span><a href="/pubmed/6686258" target="_blank">6686258</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Subvalvular%20aortic%20stenosis%22%20AND%20Clinical%20prediction%20guides%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (62)</a></div></div>
</div>
<div class="portlet mgSection" id="ID_104">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Recent_systematic_reviews">Recent systematic reviews</h1><a sid="104" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln">
<div class="nl"><a target="_blank" href="/pubmed/25378361">Paediatric subvalvular aortic stenosis: a systematic review and meta-analysis of natural history and surgical outcome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Etnel JR,
Takkenberg JJ,
Spaans LG,
Bogers AJ,
Helbing WA</span><br />
<span class="medgenPMjournal">Eur J Cardiothorac Surg</span>
2015 Aug;48(2):212-20.
Epub 2014 Nov 5
doi: 10.1093/ejcts/ezu423.
<span class="bold">PMID: </span><a href="/pubmed/25378361" target="_blank">25378361</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Subvalvular%20aortic%20stenosis%22%20AND%20systematic%5Bsb%5D%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (1)</a></div></div>
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<div class="portlet_content ln"><ul><li><a href="https://clinicaltrials.gov/search?cond=Subvalvular%20aortic%20stenosis" target="_blank">ClinicalTrials.gov</a></li></ul></div>
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