{"id":51584,"date":"2020-04-12T07:09:00","date_gmt":"2020-04-12T01:39:00","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=30965"},"modified":"2020-04-12T07:09:00","modified_gmt":"2020-04-12T01:39:00","slug":"normal-split-of-s2-mcq-answer","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/normal-split-of-s2-mcq-answer\/","title":{"rendered":"Normal split of S2 &#8211; MCQ &#8211; Answer"},"content":{"rendered":"<h2><span style=\"color: #008000;\">Normal split of S2 &#8211; MCQ &#8211; Answer<\/span><\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/gl5chYeb56M\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><br \/>\n<span style=\"color: #0000ff;\"><strong>The normal inspiratory splitting of second heart sound (S2) is due to delay in occurrence of pulmonary component (P2) as a consequence of &#8211; Correct answer:&nbsp;a) Increase in capacitance of the pulmonary vascular bed<\/strong><\/span><\/p>\n<p>Capacitance of systemic vascular bed does not change significantly with respiration. A transient reduction in left ventricular volume during inspiration contributes slightly to the split in S2 by making aortic component (A2) slightly earlier. But the predominant component is the delay in P2 [1].<\/p>\n<p>Increased capacitance of pulmonary vascular bed leads to a longer pulmonary<em> hang out&nbsp;<\/em>interval in inspiration. Hang out interval is the delay between the time of cross over of right ventricular and pulmonary artery pressure curves and the closure of the pulmonary valve.<\/p>\n<p><a href=\"https:\/\/johnsonfrancis.org\/professional\/normal-split-of-s2-mcq\/\"><strong>Back to question<\/strong><\/a><\/p>\n<p>Reference: 1. Braunwald&#8217;s Heart Disease: A Textbook of Cardiovascular Medicine, 10th Edition. Chapter 8: Physical Examination of the Heart and Circulation<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Normal split of S2 &#8211; MCQ &#8211; Answer The normal inspiratory splitting of second heart sound (S2) is due to delay in occurrence of pulmonary component (P2) as a consequence of &#8211; Correct answer:&nbsp;a) Increase in capacitance of the pulmonary vascular bed Capacitance of systemic vascular bed does not change significantly with respiration. A transient [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":31008,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[3,5],"tags":[],"class_list":["post-51584","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cardiology-mcq","category-dm-dnb-cardiology-entrance"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Normal split of S2 - MCQ - Answer - All About Cardiovascular System and Disorders<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/johnsonfrancis.org\/professional\/normal-split-of-s2-mcq-answer\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Normal split of S2 - MCQ - Answer - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"Normal split of S2 &#8211; MCQ &#8211; Answer The normal inspiratory splitting of second heart sound (S2) is due to delay in occurrence of pulmonary component (P2) as a consequence of &#8211; Correct answer:&nbsp;a) Increase in capacitance of the pulmonary vascular bed Capacitance of systemic vascular bed does not change significantly with respiration. 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