{"id":66220,"date":"2026-02-06T10:41:05","date_gmt":"2026-02-06T05:11:05","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=66220"},"modified":"2026-02-06T10:41:08","modified_gmt":"2026-02-06T05:11:08","slug":"vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/","title":{"rendered":"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/c0P1n8hWsZk?si=-FiXVTiwFk7Ms-TG\" 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\">The Vaughan Williams classification is the &#8220;gold standard&#8221; system used to categorize antiarrhythmic drugs based on the specific mechanism they use to settle a misbehaving heart.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Think of it as a <strong>1-2-3-4<\/strong> count, where each number targets a different &#8220;door&#8221; (channel) in the heart cell.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">The Big Four: A Quick Reference<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Class<\/strong><\/td><td><strong>Primary Target<\/strong><\/td><td><strong>Main Effect<\/strong><\/td><td><strong>Common Examples<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>I<\/strong><\/td><td><strong>Sodium (Na<sup>+<\/sup>) Channels<\/strong><\/td><td>Slows electrical conduction<\/td><td>Lidocaine, Flecainide<\/td><\/tr><tr><td><strong>II<\/strong><\/td><td><strong>Beta-Receptors<\/strong><\/td><td>Blunts &#8220;fight or flight&#8221; (SNS)<\/td><td>Metoprolol, Atenolol<\/td><\/tr><tr><td><strong>III<\/strong><\/td><td><strong>Potassium (K<sup>+<\/sup>) Channels<\/strong><\/td><td>Prolongs the &#8220;reset&#8221; phase<\/td><td>Amiodarone, Sotalol<\/td><\/tr><tr><td><strong>IV<\/strong><\/td><td><strong>Calcium (Ca<sup>++<\/sup>) Channels<\/strong><\/td><td>Slows the AV node &#8220;gatekeeper&#8221;<\/td><td>Verapamil, Diltiazem<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Class I: The &#8220;Sodium Channel Blockers&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These drugs stabilize the cell membrane by preventing sodium from rushing in. They are further split into three &#8220;flavors&#8221;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Ia:<\/strong> Prolongs the action potential (e.g., Procainamide).<\/li>\n\n\n\n<li class=\"\"><strong>Ib:<\/strong> Shortens the action potential (e.g., Lidocaine).<\/li>\n\n\n\n<li class=\"\"><strong>Ic:<\/strong> Strongest conduction slowing (e.g., Flecainide).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Class II: The &#8220;Beta Blockers&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These aren&#8217;t blocking ions directly; they block <strong>Adrenaline<\/strong>. By stopping the heart from over-responding to stress signals, they slow the heart rate and decrease the force of contraction.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Class III: The &#8220;Potassium Channel Blockers&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These delay <strong>repolarization<\/strong>. In simple terms, they make the heart cell take a longer &#8220;nap&#8221; before it\u2019s allowed to fire again. This is crucial for stopping rapid, re-entrant rhythms.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Note:<\/strong> Amiodarone is the &#8220;Swiss Army Knife&#8221; of this group because it actually has properties of all four classes, though it&#8217;s officially a Class III.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Class IV: The &#8220;Calcium Channel Blockers&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These specifically target the <strong>SA and AV nodes<\/strong> (the heart&#8217;s natural pacemakers). By slowing down the &#8220;gatekeeper&#8221; (the AV node), they prevent rapid atrial signals from reaching the ventricles too quickly.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Why it matters<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The classification helps clinicians choose the right tool for the job. For example, if the problem is a &#8220;speeding&#8221; AV node, a <strong>Class IV<\/strong> is a go-to. If the heart muscle itself is &#8220;irritable,&#8221; <strong>Class I or III<\/strong> might be better.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Vaughan Williams classification is the &#8220;gold standard&#8221; system used to categorize antiarrhythmic drugs based on the specific mechanism they use to settle a misbehaving heart. Think of it as a 1-2-3-4 count, where each number targets a different &#8220;door&#8221; (channel) in the heart cell. The Big Four: A Quick Reference Class Primary Target Main [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":66221,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-66220","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>Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast - 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\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"The Vaughan Williams classification is the &#8220;gold standard&#8221; system used to categorize antiarrhythmic drugs based on the specific mechanism they use to settle a misbehaving heart. Think of it as a 1-2-3-4 count, where each number targets a different &#8220;door&#8221; (channel) in the heart cell. The Big Four: A Quick Reference Class Primary Target Main [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-06T05:11:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-06T05:11:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2026\/02\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast\",\"datePublished\":\"2026-02-06T05:11:05+00:00\",\"dateModified\":\"2026-02-06T05:11:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/\"},\"wordCount\":335,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg\",\"articleSection\":[\"General Cardiology\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/\",\"name\":\"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast - All About Cardiovascular System and Disorders\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg\",\"datePublished\":\"2026-02-06T05:11:05+00:00\",\"dateModified\":\"2026-02-06T05:11:08+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#primaryimage\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg\",\"contentUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg\",\"width\":1200,\"height\":675},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast\"}]},{\"@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":"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast - All About Cardiovascular System and Disorders","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\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/","og_locale":"en_US","og_type":"article","og_title":"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast - All About Cardiovascular System and Disorders","og_description":"The Vaughan Williams classification is the &#8220;gold standard&#8221; system used to categorize antiarrhythmic drugs based on the specific mechanism they use to settle a misbehaving heart. Think of it as a 1-2-3-4 count, where each number targets a different &#8220;door&#8221; (channel) in the heart cell. The Big Four: A Quick Reference Class Primary Target Main [&hellip;]","og_url":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/","og_site_name":"All About Cardiovascular System and Disorders","article_published_time":"2026-02-06T05:11:05+00:00","article_modified_time":"2026-02-06T05:11:08+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2026\/02\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg","type":"image\/jpeg"}],"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\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#article","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/"},"author":{"name":"Johnson Francis","@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"headline":"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast","datePublished":"2026-02-06T05:11:05+00:00","dateModified":"2026-02-06T05:11:08+00:00","mainEntityOfPage":{"@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/"},"wordCount":335,"publisher":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#\/schema\/person\/5441d907049b914770f4bd98fb57feec"},"image":{"@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#primaryimage"},"thumbnailUrl":"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2026\/02\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg","articleSection":["General Cardiology"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/","url":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/","name":"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast - All About Cardiovascular System and Disorders","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/professional\/#website"},"primaryImageOfPage":{"@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#primaryimage"},"image":{"@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#primaryimage"},"thumbnailUrl":"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2026\/02\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg","datePublished":"2026-02-06T05:11:05+00:00","dateModified":"2026-02-06T05:11:08+00:00","breadcrumb":{"@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#primaryimage","url":"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2026\/02\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg","contentUrl":"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2026\/02\/Vaughan-Williams-Classification-Simplified-Antiarrhythmic-Drugs-Explained-Clear-and-Fast.jpg","width":1200,"height":675},{"@type":"BreadcrumbList","@id":"https:\/\/johnsonfrancis.org\/professional\/vaughan-williams-classification-simplified-antiarrhythmic-drugs-explained-clear-and-fast\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/johnsonfrancis.org\/professional\/"},{"@type":"ListItem","position":2,"name":"Vaughan Williams Classification Simplified: Antiarrhythmic Drugs, Explained Clear and Fast"}]},{"@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\/66220","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=66220"}],"version-history":[{"count":1,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts\/66220\/revisions"}],"predecessor-version":[{"id":66222,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/posts\/66220\/revisions\/66222"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/media\/66221"}],"wp:attachment":[{"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/media?parent=66220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/categories?post=66220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/professional\/wp-json\/wp\/v2\/tags?post=66220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}