{"id":3705,"date":"2010-01-23T12:40:25","date_gmt":"2010-01-23T12:40:25","guid":{"rendered":"http:\/\/cardiophile.org\/?p=3705"},"modified":"2023-11-13T07:28:06","modified_gmt":"2023-11-13T01:58:06","slug":"atrial-fibrillation","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/atrial-fibrillation\/","title":{"rendered":"Atrial fibrillation"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/3NDYslaNJgQ?si=mwZAgcTTpAti4QYR\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/p>\n<h2><span style=\"color: #008000;\">Atrial fibrillation<\/span><\/h2>\n<p>Atrial fibrillation is the most common sustained arrhythmia and the incidence increases as the age advances. It can cause effort intolerance in those with left ventricular diastolic dysfunction due to loss of atrial booster function for ventricular filling. Thromboembolism is another risk associated with AF. Acute onset of AF is one of the important precipitating causes for heart failure in those with pre-existing heart disease. ECG shows a narrow QRS rhythm with absent P waves and totally varying\u00a0 RR interval with often more than 50% difference between the shortest and longest. Fibrillary waves are seen as fine undulations of the baseline. When the atria are enlarged, coarse fibrillary waves are seen.<\/p>\n<p>Most often, atrial fibrillation is treated with drugs which slow the AV nodal conduction like digoxin, beta blockers or verapamil. These drugs have to be used with caution in the elderly when the possibility of atrial fibrillation being part of a tachy-brady syndrome is high. Anti-coagulation is needed to prevent thromboembolism in those at risk. When AF is associated with hemodynamic compromise in the form of hypotension, angina or heart failure, cardioversion may be needed. When elective cardioversion is being planned for atrial fibrillation which has lasted more than 48 hours, the risk of thromboembolism has to be considered. Anticoagulation for 3 weeks prior to cardioversion is conventionally practised. Exclusion of intracardiac thrombi, specifically left atrial appendage clot, by a trans-esophageal echo followed by cardioversion is another strategy, especially when it is needed in a semi-urgent situation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Atrial fibrillation is the most common sustained arrhythmia and the incidence increases as the age advances. <\/p>\n","protected":false},"author":1,"featured_media":37159,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-3705","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecg-electrophysiology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Atrial fibrillation - absent P waves and irregular RR interval<\/title>\n<meta name=\"description\" content=\"Atrial fibrillation is the most common sustained arrhythmia and the incidence increases as the age advances. There is a risk of thromboembolism.\" \/>\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\/atrial-fibrillation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Atrial fibrillation - absent P waves and irregular RR interval\" \/>\n<meta property=\"og:description\" content=\"Atrial fibrillation is the most common sustained arrhythmia and the incidence increases as the age advances. There is a risk of thromboembolism.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/atrial-fibrillation\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2010-01-23T12:40:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-11-13T01:58:06+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=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Atrial fibrillation\",\"datePublished\":\"2010-01-23T12:40:25+00:00\",\"dateModified\":\"2023-11-13T01:58:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/\"},\"wordCount\":249,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"articleSection\":[\"ECG \\\/ Electrophysiology\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/\",\"name\":\"Atrial fibrillation - absent P waves and irregular RR interval\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/atrial-fibrillation\\\/#primaryimage\"},\"thumbnailUrl\":\"\",\"datePublished\":\"2010-01-23T12:40:25+00:00\",\"dateModified\":\"2023-11-13T01:58:06+00:00\",\"description\":\"Atrial fibrillation is the most common sustained arrhythmia and the incidence increases as the age advances. 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