{"id":63811,"date":"2020-12-10T15:51:55","date_gmt":"2020-12-10T15:51:55","guid":{"rendered":"https:\/\/www.mometrix.com\/academy\/?page_id=63811"},"modified":"2026-03-28T10:55:31","modified_gmt":"2026-03-28T15:55:31","slug":"myocardial-infarction","status":"publish","type":"page","link":"https:\/\/www.mometrix.com\/academy\/myocardial-infarction\/","title":{"rendered":"Myocardial Infarctions"},"content":{"rendered":"\n\t\t\t<div id=\"mmDeferVideoEncompass_rIAPExnU6II\" style=\"position: relative;\">\n\t\t\t<picture>\n\t\t\t\t<source srcset=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2023\/01\/circle-play-duotone.webp\" type=\"image\/webp\">\n\t\t\t\t<source srcset=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2023\/01\/circle-play-duotone.png\" type=\"image\/jpeg\"> \n\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" loading=\"eager\" id=\"videoThumbnailImage_rIAPExnU6II\" data-source-videoID=\"rIAPExnU6II\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2023\/01\/circle-play-duotone.png\" alt=\"Myocardial Infarctions Video\" height=\"464\" width=\"825\" class=\"size-full\" data-matomo-title = \"Myocardial Infarctions\">\n\t\t\t<\/picture>\n\t\t\t<\/div>\n\t\t\t<style>img#videoThumbnailImage_rIAPExnU6II:hover {cursor:pointer;} img#videoThumbnailImage_rIAPExnU6II {background-size:contain;background-image:url(\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2023\/07\/updated-myocardial-infarctions-64bfdf2d192fc.webp\");}<\/style>\n\t\t\t<script defer>\n\t\t\t  jQuery(\"img#videoThumbnailImage_rIAPExnU6II\").click(function() {\n\t\t\t\tlet videoId = jQuery(this).attr(\"data-source-videoID\");\n\t\t\t\tlet helpTag = '<div id=\"mmDeferVideoYTMessage_rIAPExnU6II\" style=\"display: none;position: absolute;top: -24px;width: 100%;text-align: center;\"><span style=\"font-style: italic;font-size: small;border-top: 1px solid #fc0;\">Having trouble? <a href=\"https:\/\/www.youtube.com\/watch?v='+videoId+'\" target=\"_blank\">Click here to watch on YouTube.<\/a><\/span><\/div>';\n\t\t\t\tlet tag = document.createElement(\"iframe\");\n\t\t\t\ttag.id = \"yt\" + videoId;\n\t\t\t\ttag.src = \"https:\/\/www.youtube-nocookie.com\/embed\/\" + videoId + \"?autoplay=1&controls=1&wmode=opaque&rel=0&egm=0&iv_load_policy=3&hd=0&enablejsapi=1\";\n\t\t\t\ttag.frameborder = 0;\n\t\t\t\ttag.allow = \"autoplay; fullscreen\";\n\t\t\t\ttag.width = this.width;\n\t\t\t\ttag.height = this.height;\n\t\t\t\ttag.setAttribute(\"data-matomo-title\",\"Myocardial Infarctions\");\n\t\t\t\tjQuery(\"div#mmDeferVideoEncompass_rIAPExnU6II\").html(tag);\n\t\t\t\tjQuery(\"div#mmDeferVideoEncompass_rIAPExnU6II\").prepend(helpTag);\n\t\t\t\tsetTimeout(function(){jQuery(\"div#mmDeferVideoYTMessage_rIAPExnU6II\").css(\"display\", \"block\");}, 2000);\n\t\t\t  });\n\t\t\t  \n\t\t\t<\/script>\n\t\t\n<div class=\"accordion\"><input id=\"transcript\" type=\"checkbox\" class=\"spoiler_button\" \/><label for=\"transcript\">Transcript<\/label>\n<div class=\"spoiler\" id=\"transcript-spoiler\">\n<p>Welcome to this video about myocardial infarction!<\/p>\n<p>Our heart is the muscle that <a class=\"ylist\" href=\"https:\/\/www.mometrix.com\/academy\/heart-blood-flow\/\">pumps blood throughout our body<\/a> bringing life-giving oxygen and much-needed nutrients. It also has its own blood supply via the coronary arteries.<\/p>\n<p>The term <em>myocardial<\/em> means \u201cmuscle of the heart\u201d. An infarction is an interruption of the blood supply to a tissue, usually caused by a blood clot, or thrombus. Therefore, a myocardial infarction is the interruption of the blood supply to the heart. This typically occurs due to <a class=\"ylist\" href=\"https:\/\/www.mometrix.com\/academy\/coronary-artery-disease\/\">blockage of coronary arteries<\/a>.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/03\/heart-blockage.webp\" alt=\"\" width=\"\" height=\"\" class=\"aligncenter size-full wp-image-215971\"  role=\"img\" \/><\/p>\n<p>Loss of blood to an area of the heart equals loss of oxygen. When our tissues in the body are deprived of oxygen for a period of time they can become damaged and even die. Myocardial infarction is commonly referred to as a heart attack.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/03\/loss-of-blood-and-oxygen.webp\" alt=\"\" width=\"\" height=\"\" class=\"aligncenter size-full wp-image-215971\"  role=\"img\" \/><\/p>\n<p>A heart attack occurs in three stages: ischemia, injury, and infarction.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/03\/heart-stages-or-something-idk.webp\" alt=\"\" width=\"\" height=\"\" class=\"aligncenter size-full wp-image-215971\"  role=\"img\" \/><\/p>\n<p><strong>Ischemia<\/strong> is a restriction of blood flow (and thus a shortage of oxygen) to tissues in the body. Again, this occurs typically due to an occlusion or blood clot. Prolonged lack of oxygen to the heart muscle causes <strong>injury<\/strong> to the cells of the myocardium. If the circulation is not restored, cell death or <strong>infarction<\/strong> occurs, meaning a portion of the heart muscle dies or sustains permanent damage.<\/p>\n<p>Three types of heart attack are: ST-segment elevation myocardial infarction (STEMI), Non-ST-segment elevation myocardial infarction (non-STEMI), and Coronary spasm (also known as unstable angina).<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/03\/3-types-of-heart-attacks.webp\" alt=\"\" width=\"\" height=\"\" class=\"aligncenter size-full wp-image-215971\"  role=\"img\" \/><\/p>\n<p>STEMI is named for the ST elevation seen on an electrocardiogram. The PQRST waves show the electrical conduction through the heart muscle, and when ST is elevated this is demonstrating a partial or complete blockage of a major coronary artery and is life-threatening. <\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/03\/pqrst.webp\" alt=\"\" width=\"\" height=\"\" class=\"aligncenter size-full wp-image-215971\"  role=\"img\" \/><\/p>\n<p>Depending on the number and type of blockages, the patient may need to have an emergent cardiac catheterization to remove the blockage, or open-heart surgery.<\/p>\n<\/div>\n<\/div>\n\n<div class=\"home-buttons\">\n<p><a href=\"https:\/\/www.mometrix.com\/academy\/biology\/\">Return to Biology Videos<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Return to Biology Videos<\/p>\n","protected":false},"author":1,"featured_media":186485,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":{"0":"post-63811","1":"page","2":"type-page","3":"status-publish","4":"has-post-thumbnail","6":"page_category-anatomy-and-physiology-videos","7":"page_category-biology-videos","8":"page_category-cardiovascular-videos","9":"page_category-physiological-integrity","10":"page_category-video-pages-for-study-course-sidebar-ad","11":"page_type-video","12":"subject_matter-nursing"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages\/63811","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/comments?post=63811"}],"version-history":[{"count":5,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages\/63811\/revisions"}],"predecessor-version":[{"id":280649,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages\/63811\/revisions\/280649"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/media\/186485"}],"wp:attachment":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/media?parent=63811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}