Heart Attack - What Is a Heart Attack?

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</span> </div> </div> <div class="language-switcher-language-url block block-language block-language-blocklanguage-content" role="navigation"> <div class="responsive-container responsive-container-constrained"><h2 class="visually-hidden" aria-label="Switch to Espanol">Language switcher</h2><ul class="links"><li hreflang="en" data-drupal-link-system-path="node/92595" class="is-active" aria-current="page"><a href="/health/heart-attack" class="language-link is-active" hreflang="en" data-drupal-link-system-path="node/92595" aria-current="page">English</a></li><li hreflang="es" data-drupal-link-system-path="node/92595"><a href="/es/salud/ataque-cardiaco" class="language-link" hreflang="es" data-drupal-link-system-path="node/92595">Espa帽ol</a></li></ul> </div> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-component-page-links"> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-component-sections"> <div class="field field--name-field-component-sections field--type-entity-reference-revisions field--label-hidden"> <div class='field__items'> <div class="paragraph component component-section component-theme-white component-section-theme-white component-section-node-theme- paragraph--type--component-section paragraph--view-mode--default"> <div class="responsive-container responsive-container-constrained"> <div class="field field--name-field-component-section-content field--type-text-long field--label-hidden clearfix field__item"><p>A heart attack is a life-threatening medical emergency that requires immediate treatment.</p> <p><span><span class="entity-embed media entity-embed-nhlbi_video"></span></span></p><div class="embed-video-container embed-video-text-container-enabled align-center"> <div class="field field--name-field-video-url field--type-video-embed-field field--label-hidden field__item"><div class="video-embed-field-provider-youtube video-embed-field-responsive-video"><iframe width="854" height="480" frameborder="0" allowfullscreen="allowfullscreen" title="Heart Attack Warning Symptoms" src="https://www.youtube.com/embed/_IKsovN8Pic?autoplay=0&start=0&rel=0&enablejsapi=1"></iframe> </div> </div> <div class="embed-video-text-container"> <div class="field-video-title-container"> </div> </div> </div> <p>A heart attack, also known as a myocardial infarction, happens when the flow of blood that brings <span><span class="entity-embed node entity-embed-glossary_term"><a class="glossary-term" href="#" title="Definition of oxygen " alt="Definition of oxygen" data-term="oxygen" data-pronunciation="OK-sih-jen" data-definition="A gas that is essential for humans and other animals to live. It is breathed into the lungs from the air. In the lungs, it enters the bloodstream, where red blood cells transport it to cells throughout your body." role="link"> oxygen </a></span></span> to a part of your heart muscle suddenly becomes blocked. Your heart can鈥檛 get enough oxygen. If blood flow is not restored quickly, the heart muscle will begin to die.</p> <p>Heart attacks are very common. According to the Centers for Disease Control and Prevention, more than 800,000 people in the United States have a heart attack each year.</p> <p>A heart attack is not the same as <a href="https://www.nhlbi.nih.gov/health/cardiac-arrest" rel="noreferrer">cardiac arrest</a>, which happens when your heart suddenly and unexpectedly stops beating. A heart attack can cause sudden cardiac arrest.</p> <p>Most heart attacks are caused by coronary artery disease. Your age, lifestyle habits, and other medical conditions can raise your risk of a heart attack. <a href="https://www.nhlbi.nih.gov/health/heart-attack/symptoms" rel="noreferrer">Symptoms of a heart attack</a> include chest and upper body pain, shortness of breath, dizziness, sweatiness, and nausea. <a href="https://www.nhlbi.nih.gov/health/heart-attack/women" rel="noreferrer">Women</a> often experience different symptoms of a heart attack.</p> <p>If you think you or someone else may be having a heart attack, <strong>call 9-1-1 right away<em>.</em></strong> Acting fast can save your life. The longer the heart goes without enough oxygen, the more damage is done to the heart muscle.</p> <p>Many people survive and live active, full lives <a href="https://www.nhlbi.nih.gov/health/heart-attack/recovery" rel="noreferrer">after a heart attack</a>. Getting help and treatment quickly can limit the damage to your heart.</p></div> </div> </div> </div> </div> </div> <div class="block block-nhlbi-health-topics block-nhlbi-book-nav-block"> <nav id="book-navigation-92314" class="book-navigation responsive-container-constrained" role="navigation" aria-labelledby="book-label-92314"> <h3 class="visually-hidden" id="book-label-92314">Book traversal links for What Is a Heart Attack?</h3> <ul class="book-pager"> <li class="book-pager__item book-pager__item--next"> <h4 class="nav-label">Next</h4> <a href="/health/heart-attack/symptoms" rel="next" title="Go to next page">Symptoms <i class="fas fa-angle-right"></i></a> </li> </ul> </nav> </div> </div> </div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-last-updated"> <div class="field field--name-field-last-updated field--type-datetime field--label-hidden 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