{"id":9823,"date":"2008-11-12T16:06:46","date_gmt":"2008-11-12T16:06:46","guid":{"rendered":"http:\/\/cardiophile.org\/?p=561"},"modified":"2024-01-20T14:32:30","modified_gmt":"2024-01-20T09:02:30","slug":"ecg-quiz-20-2","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/ecg-quiz-20-2\/","title":{"rendered":"Inferolateral ischemia with QT prolongation"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/4_0rjvoU_ww?si=W-Fg3U-qlvmUmoQW\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><h2><span style=\"color: #008000;\">ECG Quiz 20<\/span><\/h2>\n<figure id=\"attachment_38112\" aria-describedby=\"caption-attachment-38112\" style=\"width: 1200px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-38112\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2008\/11\/Inferolateral-ischemia.png\" alt=\"Inferolateral ischemia\" width=\"1200\" height=\"540\" \/><figcaption id=\"caption-attachment-38112\" class=\"wp-caption-text\">Inferolateral ischemia with QT prolongation<\/figcaption><\/figure>\n<p>This ECG tracing shows mild ST segment depression in inferior leads II, III and aVF, and T wave inversion in leads I, aVL and V3 to V6. There is a pathological Q wave in aVL, with width more than 40 ms. R waves are tall in V5 and V6 suggesting left ventricular hypertrophy. QT interval is 520 ms, which at the heart rate of 60\/min has to be taken as the corrected QT interval and is therefore prolonged. Myocardial ischemia is an important common cause of QT interval prolongation. Electrolyte abnormalities like hypokalemia are also common cause for QT interval prolongation.<\/p>\n<p>QT interval can be prolonged after a cardiac arrest and associated with giant T wave inversions. Drug induced QT prolongation is also an important aspect which mandates QT testing for all new drugs. Class Ia, Ic and Class III antiarrhythmic drugs can cause prolongation of QT interval and so can a wide array of drugs including macrolide antibiotics and antipsychotic drugs. QT prolongation can predispose to life threatening ventricular tachyarrhythmias.<\/p>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>ECG Quiz 20<\/p>\n","protected":false},"author":1,"featured_media":38113,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6,7],"tags":[1852,2147,2522,3189],"class_list":["post-9823","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecg-electrophysiology","category-ecg-library","tag-inferolateral-ischemia","tag-left-ventricular-hypertrophy","tag-myocardial-ischemia","tag-qt-prolongation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ECG Quiz 20<\/title>\n<meta name=\"description\" content=\"ECG Quiz 20\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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