{"id":300,"date":"2016-09-16T05:30:47","date_gmt":"2016-09-16T00:00:47","guid":{"rendered":"http:\/\/cardiophile.org\/?p=300"},"modified":"2022-12-10T05:52:13","modified_gmt":"2022-12-10T00:22:13","slug":"colour-doppler-echocardiogram-in-mitral-stenosis","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/colour-doppler-echocardiogram-in-mitral-stenosis\/","title":{"rendered":"Colour Doppler Echocardiogram in Mitral Stenosis"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1s9aA5C41CY\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<h2><span style=\"color: #008000;\">Colour Doppler Echocardiogram in Mitral Stenosis<\/span><\/h2>\n<figure id=\"attachment_27721\" aria-describedby=\"caption-attachment-27721\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-27721 size-full\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2016\/09\/ms2.jpg\" alt=\"Colour Doppler Echocardiogram in Mitral Stenosis\" width=\"700\" height=\"243\"><figcaption id=\"caption-attachment-27721\" class=\"wp-caption-text\"><span style=\"color: #0000ff;\"><strong><em>Colour Doppler Echocardiogram in Mitral Stenosis<\/em><\/strong><\/span><\/figcaption><\/figure>\n<p><strong>First panel<\/strong> shows pulsed <span style=\"color: #0000ff;\">Doppler tracing in the lower half<\/span> with an early diastolic E wave and a late diastolic A wave (during atrial systole). In normal persons, there will be a gap between the two waves, when the atrial and ventricular diastolic pressures are equal (diastasis). Diastasis is absent in mitral stenosis as the pressures do not equalize &#8211; left atrial pressure is always higher and there is a gradient throughout diastole.<\/p>\n<p>Mitral valve area can be estimated from the downward slope of the E wave. The slope becomes more flat as the severity of the mitral stenosis increases. The <span style=\"color: #0000ff;\">pressure half time<\/span>&nbsp;of the descend of the E wave is calculated by the computerized algorithm in the echocardiograph. The PHT&nbsp;is the time taken for the peak pressure gradient to fall by half (or the velocity to fall by a factor of root 2). Mitral valve area of 1 sq. cm corresponds to a PHT&nbsp;of 220 ms. Hence dividing 220 by the measured pressure half time gives the estimated mitral valve area by PHT. In severe mitral stenosis, the slope is flat and the pressure half time longer, giving a smaller valve area by PHT.<\/p>\n<p>The A wave will be absent if there is atrial fibrillation as in the ECG.&nbsp;The <span style=\"color: #0000ff;\">upper half of the first panel<\/span> shows a&nbsp;color Doppler image in the apical four chamber view with a mosaic (turbulent) jet from the mitral valve into the left ventricle. The mosaic jet is due to the high velocity across the stenotic mitral valve.<\/p>\n<p><strong>Second panel<\/strong> shows two pictures, one with colour flow mapping and another without. The colour flow mapping shows the turbulent flow from left atrium to left ventricle through the stenosed mitral valve. The domed mitral leaflets in the open position with a narrow orifice is visible in the frame without colour flow mapping. Doming of the mitral valve is due to commissural fusion preventing full opening of the mitral leaflets in diastole. Both images are in the apical four chamber view.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Color Doppler Echocardiogram in Mitral Stenosis showing thickened and domed mitral leaflets, turbulent colour jet across the mitral valve in the right panel and Doppler tracing with E and A waves in lower part of left panel.<\/p>\n","protected":false},"author":1,"featured_media":18740,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[25,8],"tags":[819,1181,2407,3153],"class_list":["post-300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-echocardiogram-library-echocardiogram-library","category-echocardiogram-library","tag-color-doppler-echo","tag-domed-mitral-leaflets","tag-mitral-stenosis","tag-pulse-doppler-tracing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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