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</div><div><span>Heart pacemaker</span></div></div>
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</a><h1 class="with-also" itemprop="name">Heart pacemaker</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>A pacemaker is a small, battery-operated device. This device senses when your heart is beating <a test="test" href="./003081.htm">too slowly</a>. It sends a signal to your heart that makes your heart beat at the correct pace.</p><img title="Pacemaker" alt="Pacemaker" src="//medlineplus.gov/ency/images/ency/fullsize/19566.jpg" class="img-e" itemprop="image"/></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>Description</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-1"><p>Newer pacemakers weigh as little as 1 ounce (28 grams). Most pacemakers have 2 parts:</p><ul><li>The generator contains the battery and the information to control the heartbeat.</li><li>The leads which are wires that connect the heart to the generator and carry the electrical messages to the heart. </li></ul><p>A pacemaker is implanted under the skin. This procedure takes about 1 hour in most cases. You will be given a sedative to help you relax. You will be awake during the procedure.</p><p>A small incision (cut) is made. Most often, the cut is on the left side (if you are right handed) of the chest below your collarbone. The pacemaker generator is then placed under the skin at this location. The generator may also be placed in the abdomen, but this is less common. A new "leadless" pacemaker is a self-contained unit that is implanted in the right ventricle of the heart.</p><p>Using live x-rays to see the area, the doctor (most often a heart specialist called a cardiologist) puts the leads through the cut, into a vein, and then into the heart. The leads are connected to the generator. The skin is closed with stitches. Most people go home within 1 day of the procedure.</p><p>There are 2 kinds of pacemakers used only in medical emergencies. They are:</p><ul><li>Transcutaneous pacemakers</li><li>Transvenous pacemakers </li></ul><p>They are not permanent pacemakers.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Why the Procedure is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-2"><p>Pacemakers may be used for people who have heart problems that cause their heart to beat too slowly. A slow heartbeat is called <a test="test" href="./001101.htm">bradycardia</a>. Two common problems that cause a slow heartbeat are <a test="test" href="./000161.htm">sinus node disease</a> and heart block.</p><p>When your heart beats too slowly, your body and brain may not get enough oxygen. Symptoms may be</p><ul><li><a test="test" href="./003093.htm">Lightheadedness</a></li><li><a test="test" href="./003088.htm">Tiredness</a></li><li><a test="test" href="./003092.htm">Fainting spells</a></li><li><a test="test" href="./003075.htm">Shortness of breath</a></li></ul><p>Some pacemakers can be used to stop a heart rate that is too fast (<a test="test" href="./001101.htm">tachycardia</a>) or that is irregular.</p><p>Other types of pacemakers can be used in severe <a test="test" href="./000158.htm">heart failure</a>. These are called biventricular pacemakers. They help coordinate the beating of the heart chambers.</p><p>Most biventricular pacemakers implanted today can also work as <a test="test" href="./007370.htm">implantable cardioverter defibrillators</a> (ICD). ICD restore a normal heartbeat by delivering a larger shock when a potentially deadly fast heart rhythm occurs.</p><div class="videobox"><div class="group"><img class="rollover_globals" alt="Heartbeat" title="Heartbeat" src="//medlineplus.gov/ency/images/ency/tnails/200083t.gif"/>Watch this video about:<a class="blk" href="../anatomyvideos/000067.htm">Heartbeat</a></div></div></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Risks</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-3"><p>Possible complications of pacemaker surgery are:</p><ul><li><a test="test" href="./003081.htm">Abnormal heart rhythms</a></li><li><a test="test" href="./000045.htm">Bleeding</a></li><li>Punctured lung. This is rare.</li><li>Infection</li><li>Puncture of the heart, which can lead to bleeding around the heart. This is rare. </li></ul><p>A pacemaker senses if the heartbeat is above a certain rate. When it is above that rate, the pacemaker will stop sending signals to the heart. The pacemaker can also sense when the heartbeat slows down too much. It will automatically start pacing the heart again.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Before the Procedure</h2></div><div class="section-button"><button type="submit" aria-controls="section-4" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-4"><p>Always tell your health care provider about all the medicines you are taking, even medicines or herbs you bought without a prescription.</p><p>The day before your surgery:</p><ul><li>Shower and shampoo well.</li><li>You may be asked to wash your whole body below your neck with a special soap.</li></ul><p>On the day of the surgery:</p><ul><li>You may be asked not to drink or eat anything after midnight the night before your procedure. This includes chewing gum and breath mints. Rinse your mouth with water if it feels dry, but be careful not to swallow.</li><li>Take the medicines you have been told to take with a small sip of water.</li></ul><p>Your cardiologist will tell you when to arrive at the hospital.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>After the Procedure</h2></div><div class="section-button"><button type="submit" aria-controls="section-5" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-5"><p>You will probably be able to go home after 1 day or even the same day in some cases. You should be able to return to your normal activity level quickly.</p><p>Ask your cardiologist how much <a test="test" href="../patientinstructions/000097.htm">you can use the arm</a> on the side of your body where the pacemaker was placed. You may be advised not to:</p><ul><li>Lift anything heavier than 10 to 15 pounds (4.5 to 6.75 kilograms)</li><li>Push, pull, and twist your arm for 2 to 3 weeks.</li><li>Raise your arm above your shoulder for several weeks.</li></ul><p>When you leave the hospital, you will be given a card to keep in your wallet. This card lists the details of your pacemaker and has contact information for emergencies. You should always carry this wallet card with you. You should try to remember the name of the pacemaker manufacturer if you can in case you lose your card.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Outlook (Prognosis)</h2></div><div class="section-button"><button type="submit" aria-controls="section-6" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-6"><p>Pacemakers can help keep your heart rhythm and heart rate at a safe level for you. The pacemaker battery lasts about 6 to 15 years. Your provider will check the battery regularly and replace it when necessary.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Alternative Names</h2></div><div class="section-button"><button type="submit" aria-controls="section-Alt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Alt"><p>Cardiac pacemaker implantation; Artificial pacemaker; Permanent pacemaker; Internal pacemaker; Cardiac resynchronization therapy; CRT; Biventricular pacemaker; Arrhythmia - pacemaker; Abnormal heart rhythm - pacemaker; Bradycardia - pacemaker; Heart block - pacemaker; Mobitz - pacemaker; Heart failure - pacemaker; HF - pacemaker; CHF- pacemaker</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Patient Instructions</h2></div><div class="section-button"><button type="submit" aria-controls="section-carepnt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Ref"><p>American College of Cardiology website. The leadless pacemaker. <a href="https://www.acc.org/latest-in-cardiology/ten-points-to-remember/2019/06/10/13/49/the-leadless-pacemaker" target="_blank">www.acc.org/latest-in-cardiology/ten-points-to-remember/2019/06/10/13/49/the-leadless-pacemaker</a>. Updated June 10, 2019. Accessed July 29, 2024.</p><p>Chung MK, Daubert JP. Pacemakers and implantable cardioverter-defibrillators. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. <em>Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. </em>12th ed. Philadelphia, PA: Elsevier; 2022:chap 69.</p><p>Chung MK, Patton KK, Lau C-P, et al. 2023 HRS/APHRS/LAHRS guideline on cardiac physiologic pacing for the avoidance and mitigation of heart failure. <em>Heart Rhythm.</em> 2023;20(9):e17-e91. PMID: 37283271 <a href="https://pubmed.ncbi.nlm.nih.gov/37283271/" target="_blank">pubmed.ncbi.nlm.nih.gov/37283271/</a>.</p><p>Glikson M, Nielsen JC, Kronborg MB, et al. 2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy: Developed by the Task Force on cardiac pacing and cardiac resynchronization therapy of the European Society of Cardiology (ESC) With the special contribution of the European Heart Rhythm Association (EHRA). <em>European Heart Journal.</em> 2021;42(35):3427-3520. PMID: 34455430 <a href="https://pubmed.ncbi.nlm.nih.gov/34455430/" target="_blank">pubmed.ncbi.nlm.nih.gov/34455430/</a>.</p><p>Miller JM, Ellenbogen KA. Therapy for cardiac arrhythmias. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. <em>Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine.</em> 12th ed. Philadelphia, PA: Elsevier; 2022:chap 64.</p><p>Pfaff JA, Gerhardt RT. Assessment of implantable devices. In: Roberts JR, Custalow CB, Thomsen TW, eds. <em>Roberts and Hedges' Clinical Procedures in Emergency Medicine and Acute Care</em>. 7th ed. Philadelphia, PA: Elsevier; 2019:chap 13.</p><p>Santucci PA, Wilber DJ. Electrophysiologic procedures and surgery. In: Goldman L, Cooney KA, eds. <em>Goldman-Cecil Medicine.</em> 27th ed. Philadelphia, PA: Elsevier; 2024:chap 54.</p></div></div></section>
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<div id="section-version" class="section-body"><p>Updated by: Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.</p>
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