{"id":22582,"date":"2017-11-18T17:56:43","date_gmt":"2017-11-18T12:26:43","guid":{"rendered":"https:\/\/cardiophile.org\/?p=22582"},"modified":"2022-11-28T18:09:10","modified_gmt":"2022-11-28T12:39:10","slug":"strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/","title":{"rendered":"Strain and strain rate imaging for assessment of myocardial viability"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/_FBG23GKBUw\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<h2 align=\"LEFT\"><span style=\"color: #008000;\">Strain and strain rate imaging for assessment of myocardial viability<\/span><\/h2>\n<p align=\"LEFT\">Myocardial strain is a measure of deformation of a myocardial segment relative to its initial length. Strain rate is the rate at which the deformation occurs. This is in effect the gradient between velocities at two points. Strain and strain rate can be measured echocardiographically using tissue Doppler and 2D speckle tracking. A change of <span style=\"color: #0000ff;\">radial myocardial strain<\/span>&nbsp;of more than 9.5% has been shown to have a sensitivity of 83.9% and a specificity of 81.4% for detection of myocardial viability. Change in&nbsp;<span style=\"color: #0000ff;\">longitudinal myocardial strain<\/span>&nbsp;more than 14.6% had a sensitivity of 86.7% and specificity of 90.2% for detection of myocardial viability [1].<\/p>\n<p align=\"LEFT\"><span style=\"color: #0000ff;\">Low dose dobutamine<\/span> infusion along with strain rate assessment is useful to assess myocardial viability.&nbsp;<span style=\"color: #0000ff;\">Increase in peak systolic strain rate<\/span> of more than -0.23\/s gave a sensitivity of 83% and specificity of 84% compared with 18 fluorodeoxyglucose positron emission tomography as gold standard for detection of myocardial viability [2]. Thus increase in peak systolic strain rate during low dose dobutamine infusion permits discrimination between viable and non viable myocardial segments.<\/p>\n<p align=\"LEFT\"><strong><span style=\"color: #0000ff;\">References<\/span><\/strong><\/p>\n<ol>\n<li>\n<p align=\"LEFT\">Ran H, Zhang PY, Fang LL, Ma XW, Wu WF, Feng WF. Clinic value of two-dimensional speckle tracking combined with adenosine stress echocardiography for assessment of myocardial viability. Echocardiography. 2012 Jul;29(6):688-94.<\/p>\n<\/li>\n<li>\n<p align=\"LEFT\">Hoffmann, Altiok E, Nowak B, Heussen N, K\u00fchl H, Kaiser HJ, B\u00fcll U, Hanrath P. <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/11823082\">Strain rate measurement by doppler echocardiography allows improved assessment of myocardial viability inpatients with depressed left ventricular function<\/a>. J Am Coll Cardiol. 2002 Feb 6;39(3):443-9.<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Strain and strain rate imaging for myocardial viability: Myocardial strain is a measure of deformation of a myocardial segment relative to its initial length. Strain rate is the rate at which the deformation occurs. These correlated with myocardial viability.<\/p>\n","protected":false},"author":1,"featured_media":44724,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-22582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","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>Strain and strain rate imaging for myocardial viability<\/title>\n<meta name=\"description\" content=\"Strain and strain rate imaging for myocardial viability: Strain is a measure of deformation of a myocardial segment relative to its initial length.\" \/>\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\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Strain and strain rate imaging for myocardial viability\" \/>\n<meta property=\"og:description\" content=\"Strain and strain rate imaging for myocardial viability: Strain is a measure of deformation of a myocardial segment relative to its initial length.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2017-11-18T12:26:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-11-28T12:39:10+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\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Strain and strain rate imaging for assessment of myocardial viability\",\"datePublished\":\"2017-11-18T12:26:43+00:00\",\"dateModified\":\"2022-11-28T12:39:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/\"},\"wordCount\":262,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"articleSection\":[\"Echocardiography\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/\",\"name\":\"Strain and strain rate imaging for myocardial viability\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"datePublished\":\"2017-11-18T12:26:43+00:00\",\"dateModified\":\"2022-11-28T12:39:10+00:00\",\"description\":\"Strain and strain rate imaging for myocardial viability: Strain is a measure of deformation of a myocardial segment relative to its initial length.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#primaryimage\",\"url\":\"\",\"contentUrl\":\"\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Strain and strain rate imaging for assessment of myocardial viability\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#website\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/\",\"name\":\"All About Cardiovascular System and Disorders\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\",\"name\":\"Johnson Francis\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g\",\"caption\":\"Johnson Francis\"},\"logo\":{\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g\"},\"description\":\"Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/author\\\/jf\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Strain and strain rate imaging for myocardial viability","description":"Strain and strain rate imaging for myocardial viability: Strain is a measure of deformation of a myocardial segment relative to its initial length.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/","og_locale":"en_US","og_type":"article","og_title":"Strain and strain rate imaging for myocardial viability","og_description":"Strain and strain rate imaging for myocardial viability: Strain is a measure of deformation of a myocardial segment relative to its initial length.","og_url":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/","og_site_name":"All About Cardiovascular System and Disorders","article_published_time":"2017-11-18T12:26:43+00:00","article_modified_time":"2022-11-28T12:39:10+00:00","author":"Johnson Francis","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Johnson Francis","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#article","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/"},"author":{"name":"Johnson Francis","@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"headline":"Strain and strain rate imaging for assessment of myocardial viability","datePublished":"2017-11-18T12:26:43+00:00","dateModified":"2022-11-28T12:39:10+00:00","mainEntityOfPage":{"@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/"},"wordCount":262,"commentCount":0,"publisher":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"image":{"@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#primaryimage"},"thumbnailUrl":"","articleSection":["Echocardiography"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/","url":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/","name":"Strain and strain rate imaging for myocardial viability","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#website"},"primaryImageOfPage":{"@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#primaryimage"},"image":{"@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#primaryimage"},"thumbnailUrl":"","datePublished":"2017-11-18T12:26:43+00:00","dateModified":"2022-11-28T12:39:10+00:00","description":"Strain and strain rate imaging for myocardial viability: Strain is a measure of deformation of a myocardial segment relative to its initial length.","breadcrumb":{"@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#primaryimage","url":"","contentUrl":""},{"@type":"BreadcrumbList","@id":"https:\/\/johnsonfrancis.org\/professional\/strain-and-strain-rate-imaging-for-assessment-of-myocardial-viability\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/johnsonfrancis.org\/professional\/"},{"@type":"ListItem","position":2,"name":"Strain and strain rate imaging for assessment of myocardial viability"}]},{"@type":"WebSite","@id":"https:\/\/johnsonfrancis.org\/professional\/#website","url":"https:\/\/johnsonfrancis.org\/professional\/","name":"All About Cardiovascular System and Disorders","description":"","publisher":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/johnsonfrancis.org\/professional\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec","name":"Johnson Francis","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g","caption":"Johnson Francis"},"logo":{"@id":"https:\/\/secure.gravatar.com\/avatar\/80861b82c3f559be9e413245c5643b6c483c93495507facfe32cf96ccd8bcffd?s=96&d=mm&r=g"},"description":"Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal","url":"https:\/\/johnsonfrancis.org\/professional\/author\/jf\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts\/22582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/comments?post=22582"}],"version-history":[{"count":4,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts\/22582\/revisions"}],"predecessor-version":[{"id":57035,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts\/22582\/revisions\/57035"}],"wp:attachment":[{"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/media?parent=22582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/categories?post=22582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/tags?post=22582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}