Journal
HEART RHYTHM
Volume 6, Issue 8, Pages 1229-1234Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.hrthm.2009.04.001
Keywords
Phase 4 block; Complete heart block; Syncope; Sudden cardiac death; Pacemaker
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Paroxysmal atrioventricular block (AVB) is a poorly defined clinical entity characterized by abrupt and unexpected change from 1:1 atrioventricular conduction to complete heart block, leading to syncope and potential sudden cardiac death. Although a dangerous condition because of unreliable escape mechanism, proper diagnosis of paroxysmal AVB is often missed and overlooked because of its unfamiliarity, unpredictability, and in some cases, no clear evidence of atrioventricular conduction disease during normal 1:1 conduction.
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