{"id":22622,"date":"2017-11-21T10:50:49","date_gmt":"2017-11-21T05:20:49","guid":{"rendered":"https:\/\/cardiophile.org\/?p=22622"},"modified":"2017-11-21T10:50:49","modified_gmt":"2017-11-21T05:20:49","slug":"myocardial-viability-assessment-by-cardiac-mri","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/","title":{"rendered":"Myocardial viability assessment by cardiac MRI"},"content":{"rendered":"<h2><span style=\"color: #008000;\">Myocardial viability assessment by cardiac MRI<\/span><\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/jnC3SyWT2wY\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><br \/>\nCardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. <span style=\"color: #0000ff;\">Preserved myocardial wall thickness of more than 5.5 mm has a good sensitivity of 95%, but low specificity for detecting myocardial viability on CMR.<\/span><\/p>\n<p>Delayed or late gadolinium enhancement (LGE) on CMR indicates myocardial scar. If the extent of scar is less as indicated by less than 50% transmural extent of hyperenhancement indicates viability. If 4 or more dysfunctional segments show viability, it has a good sensitivity of 95%, again with low specificity of 45%.<\/p>\n<p>Dobutamine cine MRI is useful in assessing the contractile reserve of the myocardium. Improvement in myocardial thickening of more than 2 mm with low dose dobutamine CMR is indicative of viability.<\/p>\n<p>CMR has the advantage of an accurate assessment of the extent of myocardial scar with superior spatial resolution. Wall thickness can be accurately measured by CMR. The image quality is not limited by characteristics of patient chest wall as in echocardiography. There is good interobserver and intraobserver agreement in the assessment of LGE. CMR has good sensitivity and a fair specificity.<\/p>\n<p>Some of the limitations of CMR are its high cost, limited availability, longer imaging time and restrictions in patients with cardiac implantable electronic devices (CIED). Claustrophobia of patients may sometimes prevent CMR imaging. Gadolinium enhancement is not suitable in those with low glomerular filtration rate of below 30 ml per minute. Irregular heart rhythms make gating difficult. Sick patients may find breathholding difficult. While performing dobutamine stress, there are technical difficulties in monitoring the patient in the MRI suite.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness of more than 5.5 mm has a good sensitivity of 95%, but low specificity for detecting myocardial viability on CMR.<\/p>\n","protected":false},"author":1,"featured_media":40743,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[20],"tags":[],"class_list":["post-22622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cardiac-magnetic-resonance-imaging"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Myocardial viability assessment by cardiac magnetic resonance imaging<\/title>\n<meta name=\"description\" content=\"Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness indicates myocardial viability.\" \/>\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\/myocardial-viability-assessment-by-cardiac-mri\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Myocardial viability assessment by cardiac magnetic resonance imaging\" \/>\n<meta property=\"og:description\" content=\"Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness indicates myocardial viability.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2017-11-21T05:20:49+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\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Myocardial viability assessment by cardiac MRI\",\"datePublished\":\"2017-11-21T05:20:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/\"},\"wordCount\":262,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"articleSection\":[\"Cardiac Magnetic Resonance imaging\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/\",\"name\":\"Myocardial viability assessment by cardiac magnetic resonance imaging\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"datePublished\":\"2017-11-21T05:20:49+00:00\",\"description\":\"Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness indicates myocardial viability.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#primaryimage\",\"url\":\"\",\"contentUrl\":\"\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/myocardial-viability-assessment-by-cardiac-mri\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Myocardial viability assessment by cardiac MRI\"}]},{\"@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":"Myocardial viability assessment by cardiac magnetic resonance imaging","description":"Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness indicates myocardial viability.","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\/myocardial-viability-assessment-by-cardiac-mri\/","og_locale":"en_US","og_type":"article","og_title":"Myocardial viability assessment by cardiac magnetic resonance imaging","og_description":"Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness indicates myocardial viability.","og_url":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/","og_site_name":"All About Cardiovascular System and Disorders","article_published_time":"2017-11-21T05:20:49+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\/myocardial-viability-assessment-by-cardiac-mri\/#article","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/"},"author":{"name":"Johnson Francis","@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"headline":"Myocardial viability assessment by cardiac MRI","datePublished":"2017-11-21T05:20:49+00:00","mainEntityOfPage":{"@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/"},"wordCount":262,"publisher":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"image":{"@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/#primaryimage"},"thumbnailUrl":"","articleSection":["Cardiac Magnetic Resonance imaging"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/","url":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/","name":"Myocardial viability assessment by cardiac magnetic resonance imaging","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#website"},"primaryImageOfPage":{"@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/#primaryimage"},"image":{"@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/#primaryimage"},"thumbnailUrl":"","datePublished":"2017-11-21T05:20:49+00:00","description":"Cardiac magnetic resonance (CMR) imaging can be used to assess myocardial viability. Preserved myocardial wall thickness indicates myocardial viability.","breadcrumb":{"@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/#primaryimage","url":"","contentUrl":""},{"@type":"BreadcrumbList","@id":"https:\/\/johnsonfrancis.org\/professional\/myocardial-viability-assessment-by-cardiac-mri\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/johnsonfrancis.org\/professional\/"},{"@type":"ListItem","position":2,"name":"Myocardial viability assessment by cardiac MRI"}]},{"@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\/22622","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=22622"}],"version-history":[{"count":0,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts\/22622\/revisions"}],"wp:attachment":[{"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/media?parent=22622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/categories?post=22622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/tags?post=22622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}