{"id":269,"date":"2015-12-11T04:34:20","date_gmt":"2015-12-10T23:04:20","guid":{"rendered":"http:\/\/cardiophile.org\/?p=269"},"modified":"2015-12-11T04:34:20","modified_gmt":"2015-12-10T23:04:20","slug":"what-are-the-mechanisms-of-austin-flint-murmur-in-aortic-regurgitation","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/what-are-the-mechanisms-of-austin-flint-murmur-in-aortic-regurgitation\/","title":{"rendered":"Mechanisms of Austin Flint murmur"},"content":{"rendered":"<h2 style=\"text-align: left;\"><span style=\"color: #008000;\">Mechanisms of Austin Flint murmur<\/span><\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/7JulTtz3EOE\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<p>Mechanisms of <a href=\"https:\/\/johnsonfrancis.org\/professional\/austin-flint-murmur2\/\">Austin Flint murmur<\/a> in aortic regurgitation &#8211; following are the proposed mechanisms for the mid diastolic murmur in mitral area in severe aortic regurgitation:<\/p>\n<ol>\n<li>Fluttering of the anterior mitral leaflet due to the regurgitant jet impinging on it<\/li>\n<li>Jet can produce relative narrowing of the mitral orifice<\/li>\n<li>Elevation of left ventricular diastolic pressure causes the mitral valve to float back to a partially closed position<\/li>\n<li>Diastolic mitral regurgitation due to elevated left ventricular diastolic pressure [1]<\/li>\n<\/ol>\n<p>The fluttering of anterior mitral leaflet and early closure due the aortic regurgitation jet has been demonstrated in a case report by cine magnetic resonance imaging [2]. Severity of aortic regurgitation was demonstrated to be more in those with Austin Flint murmur than those without the murmur [3].<\/p>\n<p>A Doppler echo study did not support mechanisms 2 and 4 described above, while supporting mechanism 1 [4].<\/p>\n<p><strong><span style=\"color: #0000ff;\">References<\/span><\/strong><\/p>\n<ol>\n<li><span style=\"line-height: 1.5;\">Brand\u00e3o AP, Lipton MJ. Mitral diastolic regurgitation and the Austin Flint murmur.&nbsp;Arq Bras Cardiol. 1970 Oct;23(5):319-26.<br \/>\n<\/span><\/li>\n<li><span style=\"line-height: 1.5;\">Weir RA, Dargie HJ. Images in clinical medicine. <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/18768939\">Austin flint murmur<\/a>. N Engl J Med. 2008 Sep 4;359(10):e11.<\/span><\/li>\n<li>Emi S, Fukuda N, Oki T, Iuchi A, Tabata T, Kiyoshige K, Fujimoto T, Manabe K, Ito S. Genesis of the Austin Flint murmur: relation to mitral inflow and aortic regurgitant flow dynamics.&nbsp;J Am Coll Cardiol. 1993 May;21(6):1399-405.<\/li>\n<li>Rahko PS. Doppler and echocardiographic characteristics of patients having an Austin Flint murmur.&nbsp;Circulation. 1991 Jun;83(6):1940-50.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Mechanisms of Austin Flint murmur in aortic regurgitation: fluttering of AML, relative narrowing of mitral orifice, elevated LVEDP, diastolic MR.<\/p>\n","protected":false},"author":1,"featured_media":32993,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-269","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mechanisms of Austin Flint murmur in aortic regurgitation<\/title>\n<meta name=\"description\" content=\"Mechanisms of Austin Flint murmur in aortic regurgitation: 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