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<div about="/news-events/nih-research-matters/diet-may-affect-risk-sudden-cardiac-death" typeof="sioc:Item foaf:Document" class="ds-1col node node--nih-research-matters view-mode-full node--full node--nih-research-matters--full clearfix">
<p class="publishdate"><span property="dc:date" datatype="xsd:dateTime" content="2021-07-20T00:00:00-04:00" class="date-display-single">July 20, 2021</span></p><div class='syndicate'><h1>Diet may affect risk of sudden cardiac death</h1><div class="callout callout-with-border"><h3>At a Glance</h3>
<ul>
<li>A study found that a diet high in added fats, fried foods, processed meats, and sugary drinks was associated with a greater risk of sudden cardiac death, while a Mediterranean diet was associated with a lower risk.</li>
<li>The findings provide evidence that adopting a healthier diet may decrease the risk of sudden cardiac death.</li>
</ul></div><div class="media-float-right"><div class="ds-1col file file-image file-image-jpeg view-mode-floated_media clearfix">
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<img src="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2021/20210720-diet.jpg?itok=_F9jQSO0&amp;timestamp=1626791762" alt="Groups of fast foods and healthy foods" title="Groups of fast foods and healthy foods" />
</picture><span class="caption">The study adds to evidence about how dietary choices affect heart health. </span><span class="credit">Mukhina1 / iStock / Getty Images Plus</span></div>
</div><p>Diet is known to influence heart health. Experts recommend a diet low in sodium and saturated fat to reduce the risk of heart disease. A heart-healthy diet also includes plenty of vegetables, fruits, and whole grains. Research shows that the Mediterranean diet—full of fruits, vegetables, fish, cereals, and legumes, with little meat and dairy—may reduce the risk of heart disease.  </p>
<p>Few studies have examined the relationship between overall diet and sudden cardiac death, a common cause of death in the United States. In sudden cardiac death, the heart abruptly stops beating, leading to death within an hour of symptoms. Small studies have suggested that the Mediterranean diet may lower the risk of sudden cardiac death.</p>
<p>A team led by Dr. James M. Shikany of the University of Alabama at Birmingham examined whether dietary patterns are associated with the risk of sudden cardiac death. The study was funded by NIHs National Institute of Neurological Disorders and Stroke (NINDS), National Institute on Aging (NIA), and National Heart, Lung, and Blood Institute (NHLBI). Results were published in the <em>Journal of the American Heart Association</em> on July 6, 2021.</p>
<p>The researchers analyzed the diets of more than 21,000 participants using a food questionnaire at the start of the study. Participants were asked how often and in what quantities they ate 110 foods in the past year. Both those with and without a history of coronary heart disease were included. Participants were part of the long-running REGARDS (REasons for Geographic and Racial Differences in Stroke) study.</p>
<p>Based on the questionnaire responses, researchers calculated a Mediterranean diet score. They also identified five dietary patterns. One, which they termed the “Southern” eating pattern, has large amounts of added fats, fried food, eggs, organ and processed meats, and sugarsweetened beverages. Other dietary patterns included a “sweets” pattern heavy on added sugar, a “convenience” pattern made mainly of ready-to-eat foods and take-out, a “plant-based” pattern,” and an “alcohol and salad” pattern.</p>
<p>The researchers assessed how closely participants adhered to each dietary pattern. For example, someone could adhere closely to the Mediterranean diet while also adhering to the “sweets” pattern, but to a lesser degree. They also recorded any heart-related events over an average of 10 years.</p>
<p>More than 400 sudden cardiac deaths occurred during the study. Analyses showed that regularly eating a Southern-style diet may increase the risk of sudden cardiac death, while consuming a Mediterranean diet may reduce risk.</p>
<p>Participants with a Southern dietary pattern had a 46% higher risk of sudden cardiac death than those with the lowest adherence. In contrast, people closely following the Mediterranean diet had a 26% lower risk of sudden cardiac death than others with the least adherence. These differences were of borderline statistical significance (not enough to prove they werent due to chance or some other factor). Among those with no coronary heart disease at the start of the study, those closely following the Mediterranean diet had a statistically significant 41% reduction in risk of sudden cardiac death compared to those with the least adherence.</p>
<p>“While this study was observational in nature, the results suggest that diet may be a modifiable risk factor for sudden cardiac death,” Shikany says.</p>
<p>These results support other findings that improving your diet can have a significant effect on heart health.</p>
<p>—by Erin Bryant</p></div><h2 class="label-above">Related Links</h2><ul class="spaced print-urls"><li><a href="https://www.nih.gov/news-events/nih-research-matters/low-fat-diet-compared-low-carb-diet" target="_top">Low-Fat Diet Compared to Low-Carb Diet</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/life-support-machine-helps-cardiac-arrest-patients-survive" target="_top">Life Support Machine Helps Cardiac Arrest Patients Survive</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/comparing-heart-disease-treatments" target="_top">Comparing Heart Disease Treatments</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/eating-highly-processed-foods-linked-weight-gain" target="_top">Eating Highly Processed Foods Linked to Weight Gain</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/how-dietary-factors-influence-disease-risk" target="_top">How Dietary Factors Influence Disease Risk</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/eating-red-meat-daily-triples-heart-disease-related-chemical" target="_top">Eating Red Meat Daily Triples Heart Disease-Related Chemical</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/dietary-fat-vs-carbohydrate-reducing-body-fat" target="_top">Dietary Fat vs. Carbohydrate for Reducing Body Fat</a></li><li><a href="https://newsinhealth.nih.gov/special-issues" target="_top">Healthy Eating</a></li><li><a href="https://www.nhlbi.nih.gov/health-topics/sudden-cardiac-arrest" target="_top">Sudden Cardiac Arrest</a></li><li><a href="https://www.uab.edu/soph/regardsstudy/" target="_top">REGARDS study</a></li></ul><p class="footnote"><strong class="label-inline">References:&nbsp;</strong><a href="https://pubmed.ncbi.nlm.nih.gov/34189926/">Mediterranean Diet Score, Dietary Patterns, and Risk of Sudden Cardiac Death in the REGARDS Study.</a> Shikany JM, Safford MM, Soroka O, Brown TM, Newby PK, Durant RW, Judd SE. <em>J Am Heart Assoc. </em>2021 Jul 6;10(13):e019158. doi: 10.1161/JAHA.120.019158. Epub 2021 Jun 30. PMID: 34189926.</p><p class="footnote"><strong class="label-inline">Funding:&nbsp;</strong>NIHs National Institute of Neurological Disorders and Stroke (NINDS), National Institute on Aging (NIA), and National Heart, Lung, and Blood Institute (NHLBI).</p>
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