{"id":64422,"date":"2025-08-07T14:22:28","date_gmt":"2025-08-07T08:52:28","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=64422"},"modified":"2025-08-07T14:22:58","modified_gmt":"2025-08-07T08:52:58","slug":"diagnostic-criteria-for-right-bundle-branch-block","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/diagnostic-criteria-for-right-bundle-branch-block\/","title":{"rendered":"Diagnostic criteria for right bundle branch block"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/uroiG2alMsM?si=lcGCl-hzhquJdWPf\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n<p class=\"wp-block-paragraph\">Just as in the case of left bundle branch block, QRS duration should be 120 ms or more in complete right bundle branch block.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the duration is less than 120 ms, with RBBB pattern, then it will be called incomplete RBBB, sometimes written as IRBBB. IRBBB pattern could be a normal variant and is often a feature of right ventricular volume overload as in atrial septal defect with large left to right shunt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">rsr&#8217;, rsR&#8217; or rSR&#8217; patterns in leads V1 and V2. The terminal R&#8217; wave indicates delayed activation of right ventricle in RBBB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S waves in leads I and V6 \u00a0\u226540 ms wide. That also represents delayed activation of right ventricle as seen from left oriented leads.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Normal time to peak R wave in V5 and V6, but >50 ms in V1. That represents delayed activation of right ventricle as noted from right oriented leads in RBBB.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Just as in the case of left bundle branch block, QRS duration should be 120 ms or more in complete right bundle branch block. If the duration is less than 120 ms, with RBBB pattern, then it will be called incomplete RBBB, sometimes written as IRBBB. IRBBB pattern could be a normal variant and is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":64424,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-64422","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>Diagnostic criteria for right bundle branch block - 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\/diagnostic-criteria-for-right-bundle-branch-block\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Diagnostic criteria for right bundle branch block - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"Just as in the case of left bundle branch block, QRS duration should be 120 ms or more in complete right bundle branch block. If the duration is less than 120 ms, with RBBB pattern, then it will be called incomplete RBBB, sometimes written as IRBBB. IRBBB pattern could be a normal variant and is [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/diagnostic-criteria-for-right-bundle-branch-block\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-07T08:52:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-07T08:52:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2025\/08\/Diagnostic-Criteria-for-Right-Bundle-Branch-Block.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1203\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\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=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/diagnostic-criteria-for-right-bundle-branch-block\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/diagnostic-criteria-for-right-bundle-branch-block\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Diagnostic criteria for right bundle branch block\",\"datePublished\":\"2025-08-07T08:52:28+00:00\",\"dateModified\":\"2025-08-07T08:52:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/diagnostic-criteria-for-right-bundle-branch-block\\\/\"},\"wordCount\":153,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/diagnostic-criteria-for-right-bundle-branch-block\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Diagnostic-Criteria-for-Right-Bundle-Branch-Block.jpg\",\"articleSection\":[\"General Cardiology\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/diagnostic-criteria-for-right-bundle-branch-block\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/diagnostic-criteria-for-right-bundle-branch-block\\\/\",\"name\":\"Diagnostic criteria for right bundle branch block - 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