{"id":551,"date":"2016-05-15T00:01:55","date_gmt":"2016-05-15T00:01:55","guid":{"rendered":"http:\/\/torreyekg.com\/?p=551"},"modified":"2016-05-09T00:08:23","modified_gmt":"2016-05-09T00:08:23","slug":"ekg-of-the-week-30","status":"publish","type":"post","link":"http:\/\/torreyekg.com\/index.php\/2016\/05\/15\/ekg-of-the-week-30\/","title":{"rendered":"EKG of the Week #30"},"content":{"rendered":"<p><a href=\"http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/301.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/301.png\" alt=\"301\" width=\"647\" height=\"351\" class=\"alignnone size-full wp-image-552\" srcset=\"http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/301.png 647w, http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/301-300x163.png 300w\" sizes=\"auto, (max-width: 647px) 100vw, 647px\" \/><\/a><br \/>\nWhat are the diagnostic criteria for this rhythm?<\/p>\n<div class=\"spoiler-wrap\"><div class=\"spoiler-head collapsed\" title=\"Expand\">Answers and Explanations<\/div><div class=\"spoiler-body\" style=\"display: none;\"><br \/>\nThis rhythm is 2\u00b0 AV block Type I, Wenckebach.  While it is easily recognizable (I hope!), the actual criteria, or electrocardiographic findings, are worth reviewing.\n<p>1.  progressive lengthening of the PR interval until a P wave is blocked<br \/>\n2.  progressive shortening of the RR interval until a P wave is blocked<br \/>\n3.  the RR interval containing the blocked P wave is shorter than the sum of 2 PP intervals<\/p>\n<p>When Type I 2\u00b0 AV block does not precisely follow these relationships it is typically due to underlying sinus arrhythmia, which alters the RR interval, which in turn will affect the RP and PR intervals of subsequent beats.<\/p>\n<p>Because of the periodic pauses, the rhythm shows \u201cgroup beating,\u201d a finding that frequently leads to consideration of the diagnosis of Wenckebach phenomenon.<\/p>\n<p>Another example of this rhythm<br \/>\n<a href=\"http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/302.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/302.png\" alt=\"302\" width=\"468\" height=\"55\" class=\"alignnone size-full wp-image-553\" srcset=\"http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/302.png 468w, http:\/\/torreyekg.com\/wp-content\/uploads\/2016\/05\/302-300x35.png 300w\" sizes=\"auto, (max-width: 468px) 100vw, 468px\" \/><\/a><br \/>\n<\/p><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>What are the diagnostic criteria for this rhythm?<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-551","post","type-post","status-publish","format-standard","hentry","category-ekg-of-the-week"],"_links":{"self":[{"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/posts\/551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/comments?post=551"}],"version-history":[{"count":4,"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/posts\/551\/revisions"}],"predecessor-version":[{"id":568,"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/posts\/551\/revisions\/568"}],"wp:attachment":[{"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/media?parent=551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/categories?post=551"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/torreyekg.com\/index.php\/wp-json\/wp\/v2\/tags?post=551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}