{"id":596,"date":"2008-11-16T09:04:18","date_gmt":"2008-11-16T09:04:18","guid":{"rendered":"http:\/\/cardiophile.org\/?p=596"},"modified":"2008-11-16T09:04:18","modified_gmt":"2008-11-16T09:04:18","slug":"radiofrequency-catheter-ablation-of-avnrt","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/radiofrequency-catheter-ablation-of-avnrt\/","title":{"rendered":"Radiofrequency catheter ablation of AVNRT"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/nVfueX8Suv0\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<h2><span style=\"color: #008000;\">Radiofrequency catheter ablation of AVNRT<\/span><\/h2>\n<p>Radiofrequency catheter ablation of AVNRT: AVNRT (atrioventricular nodal reentrant tachycardia) occurs in patients with dual AV nodal physiology. The fast pathway is anteriorly situated along septal portion of tricuspid annulus. Slow pathway is posteriorly situated close to the coronary sinus ostium.<\/p>\n<p><span style=\"color: #0000ff;\"><strong>Fast pathway ablation for AVNRT &#8211; Anterior approach<\/strong><\/span><\/p>\n<p>Fast pathway ablation for AVNRT is by the anterior approach and has a 90% success rate. But AV block occurs in about 7%. The recurrence rate for fast pathway ablation is about 9%. Fast pathway ablation is seldom being practised now.<\/p>\n<p><span style=\"color: #0000ff;\"><strong>Slow pathway ablation for AVNRT &#8211; Posterior approach<\/strong><\/span><\/p>\n<p>Slow pathway ablation is done by the posterior approach by taking the ablation catheter away from the His bundle catheter towards the region of the coronary sinus catheter. Junctional beats occuring during the delivery of radiofrequency energy are a marker for successful ablation of slow pathway. The success rate of slow pathway ablation is 95-97%. AV block occurs in less than 0.5-1% cases of slow pathway ablation. The recurrence rate of slow pathway ablation is about 3%. Now a days the posterior approach preferred due to the higher efficacy, lower recurrence and AV block and higher chance of having of normal PR interval after ablation.<\/p>\n<p><strong><span style=\"color: #0000ff;\">Further reading<\/span><\/strong><\/p>\n<ol>\n<li>Calkins H, Kumar VK, Francis J. <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC1564051\/\">Radiofrequency catheter ablation of supraventricular tachycardia<\/a>. Indian Pacing Electrophysiol J. 2002 Apr 1;2(2):45-9.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Radiofrequency catheter ablation of AVNRT: Slow pathway ablation for AVNRT &#8211; Posterior approach, Fast pathway ablation for AVNRT &#8211; Anterior approach.<\/p>\n","protected":false},"author":1,"featured_media":31591,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-596","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>Radiofrequency catheter ablation of AVNRT<\/title>\n<meta name=\"description\" content=\"Radiofrequency catheter ablation of AVNRT: Slow pathway ablation for AVNRT - Posterior approach, Fast pathway ablation for AVNRT - 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