{"id":42575,"date":"2021-02-17T14:15:20","date_gmt":"2021-02-17T08:45:20","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=42575"},"modified":"2021-02-17T14:15:20","modified_gmt":"2021-02-17T08:45:20","slug":"bicuspid-aortic-valve-and-eccentricity-index","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/bicuspid-aortic-valve-and-eccentricity-index\/","title":{"rendered":"Bicuspid aortic valve and eccentricity index"},"content":{"rendered":"<h2><span style=\"color: #008000;\">Bicuspid aortic valve and eccentricity index<\/span><\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/MOv4vbmqEm0\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<figure id=\"attachment_42576\" aria-describedby=\"caption-attachment-42576\" style=\"width: 684px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-42576\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2021\/02\/eccentricity.jpg\" alt=\"Bicuspid aortic valve and eccentricity index\" width=\"684\" height=\"266\"><figcaption id=\"caption-attachment-42576\" class=\"wp-caption-text\">Bicuspid aortic valve and eccentricity index<\/figcaption><\/figure>\n<p>The M-mode echocardiogram shows eccentric valve closure in diastole. Systolic opening of the valve is good.<\/p>\n<p><strong><span style=\"color: #0000ff;\">Eccentricity index for a bicuspid aortic valve<\/span><\/strong> is calculated as follows [1]:<\/p>\n<p style=\"padding-left: 40px;\">1\/2 of aortic lumen diameter divided by minimum distance of diastolic cusp echo from nearest aortic margin<\/p>\n<p>The measurement is illustrated in the image below:<\/p>\n<figure id=\"attachment_42580\" aria-describedby=\"caption-attachment-42580\" style=\"width: 682px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-42580\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2021\/02\/Eccentricity-index-in-bicuspid-aortic-valve.jpg\" alt=\"Eccentricity index in bicuspid aortic valve\" width=\"682\" height=\"502\"><figcaption id=\"caption-attachment-42580\" class=\"wp-caption-text\">Eccentricity index in bicuspid aortic valve<\/figcaption><\/figure>\n<p>The diastolic diameter of the aorta is represented by A. Half of it is taken for the calculation of eccentricity index. B represents the minimum distance of diastolic cusp echo from nearest aortic margin. In the study by Nanda NC et al [1], the eccentricity index was low (1.0 to 1.25) in trileaflet valves. Eccentricity index ranged from 1.5 to 5.6 with mean of 2.43 in those with bicuspid aortic valves.<\/p>\n<p>Central closure line of the aortic valve in a trileaflet valve is shown below for comparison:<\/p>\n<figure id=\"attachment_19418\" aria-describedby=\"caption-attachment-19418\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-19418 size-full\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2015\/10\/Ao-LA.jpg\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" srcset=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2015\/10\/Ao-LA.jpg 500w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2015\/10\/Ao-LA-300x171.jpg 300w\" alt=\"Symmetric closure line of trileaflet aortic valve\" width=\"500\" height=\"285\"><figcaption id=\"caption-attachment-19418\" class=\"wp-caption-text\">Symmetric closure line of trileaflet aortic valve<\/figcaption><\/figure>\n<p>If the eccentricity index is calculated for this trileaflet valve, it will be close to 1.<\/p>\n<p>Two dimensional image with bicuspid aortic valve in open position is given below:<\/p>\n<figure id=\"attachment_42585\" aria-describedby=\"caption-attachment-42585\" style=\"width: 292px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-42585\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2021\/02\/aov.jpg\" alt=\"Bicuspid aortic valve in open positionBicuspid aortic valve in open position\" width=\"292\" height=\"258\"><figcaption id=\"caption-attachment-42585\" class=\"wp-caption-text\">Bicuspid aortic valve in open position<\/figcaption><\/figure>\n<p>Two obliquely oriented leaflets are seen in open position. In case of trileaflet valve, three leaflets will be seen.<\/p>\n<p><strong><span style=\"color: #0000ff;\">Reference<\/span><\/strong><\/p>\n<ol>\n<li>Nanda NC, Gramiak R, Manning J, Mahoney EB, Lipchik EO, DeWeese JA. <a href=\"https:\/\/www.ahajournals.org\/doi\/pdf\/10.1161\/01.CIR.49.5.870\">Echocardiographic recognition of the congenital bicuspid aortic valve<\/a>. Circulation. 1974 May;49(5):870-5.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Bicuspid aortic valve and eccentricity index The M-mode echocardiogram shows eccentric valve closure in diastole. Systolic opening of the valve is good. Eccentricity index for a bicuspid aortic valve is calculated as follows [1]: 1\/2 of aortic lumen diameter divided by minimum distance of diastolic cusp echo from nearest aortic margin The measurement is illustrated [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":42580,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[25,8],"tags":[],"class_list":["post-42575","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-echocardiogram-library-echocardiogram-library","category-echocardiogram-library"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bicuspid aortic valve and eccentricity index - 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\/bicuspid-aortic-valve-and-eccentricity-index\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bicuspid aortic valve and eccentricity index - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"Bicuspid aortic valve and eccentricity index The M-mode echocardiogram shows eccentric valve closure in diastole. Systolic opening of the valve is good. Eccentricity index for a bicuspid aortic valve is calculated as follows [1]: 1\/2 of aortic lumen diameter divided by minimum distance of diastolic cusp echo from nearest aortic margin The measurement is illustrated [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/bicuspid-aortic-valve-and-eccentricity-index\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2021-02-17T08:45:20+00:00\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/bicuspid-aortic-valve-and-eccentricity-index\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/bicuspid-aortic-valve-and-eccentricity-index\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Bicuspid aortic valve and eccentricity index\",\"datePublished\":\"2021-02-17T08:45:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/bicuspid-aortic-valve-and-eccentricity-index\\\/\"},\"wordCount\":268,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/bicuspid-aortic-valve-and-eccentricity-index\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"articleSection\":[\"Echocardiogram Library\",\"Echocardiography\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/bicuspid-aortic-valve-and-eccentricity-index\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/bicuspid-aortic-valve-and-eccentricity-index\\\/\",\"name\":\"Bicuspid aortic valve and eccentricity index - 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