{"id":3799,"date":"2010-02-24T07:56:36","date_gmt":"2010-02-24T07:56:36","guid":{"rendered":"http:\/\/cardiophile.org\/?p=3799"},"modified":"2023-11-11T21:25:45","modified_gmt":"2023-11-11T15:55:45","slug":"second-degree-av-block","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/second-degree-av-block\/","title":{"rendered":"Second degree AV block"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0deAtukq_QI?si=GHRD2iakTnGN66VD\" 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;\">Second degree AV block<\/span><\/h2>\n<figure id=\"attachment_26877\" aria-describedby=\"caption-attachment-26877\" style=\"width: 989px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-26877 size-full\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2010\/02\/2-to-1-AV-block.jpg\" alt=\"Second degree AV block\" width=\"989\" height=\"721\" \/><figcaption id=\"caption-attachment-26877\" class=\"wp-caption-text\">Second degree AV block<\/figcaption><\/figure>\n<p>There is a limitation in interpreting the rhythm as a long rhythm strip is not available. The PR interval of the first beat is quite prolonged so that it overlaps with the T wave of the previous beat. The next P wave, marked in red colour, is superimposed on the T wave as well as non conducted, resulting in a pause. The PR interval of the second beat is less prolonged as the conduction recovers partially following the blocked beat and the pause. The next PR interval is again prolonged. So overall the ECG shows a 3:2 type I AV block, with a bigeminal rhythm. QRS complex is narrow, indicating a supra Hisian location of the block. These features fit in with the Wenckebach phenomenon or Mobitz type 1 second degree AV block.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ECG showing Second degree AV block.<\/p>\n","protected":false},"author":1,"featured_media":19649,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6,7],"tags":[],"class_list":["post-3799","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecg-electrophysiology","category-ecg-library"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Second degree AV block<\/title>\n<meta name=\"description\" content=\"ECG showing Second degree AV block.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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