Document Detail

Pattern of Recovery for Transient Complete Heart Block After Open Heart Surgery for Congenital Heart Disease: Duration Alone Predicts Risk of Late Complete Heart Block.
MedLine Citation:
PMID:  23179430     Owner:  NLM     Status:  Publisher    
Transient complete heart block (TCHB) is defined as complete interruption of atrioventricular conduction (AVC) after cardiac surgery followed by return of conduction. This study aimed to assess the risk for the development of late complete heart block (LCHB) after recovery of TCHB and to examine the electrocardiographic and electrophysiologic properties of the AVC system after TCHB. Of the 44 patients in this study who experienced TCHB, 37 recovered completely. Seven patients progressed from TCHB to intermittent CHB or LCHB requiring pacemaker implantation. Preoperative, early postoperative, and late postoperative electrocardiograms as well as postoperative atrial stimulation were obtained. The results showed that the median duration of TCHB was 5 days in the TCHB group compared with 9 days in the LCHB group (p = 0.01). All 37 subjects with TCHB recovered AVC within 12 days, but only two with LCHB did so (p = 0.02). The risk of LCHB for the patients with 7 days of postoperative TCHB or longer was 13 times greater than for the patients with fewer than 7 days of TCHB (p = 0.01). The median late postoperative PR interval was slightly but significantly longer in the LCHB group than in the TCHB group (p = 0.02). In contrast, the electrophysiologic properties between the two groups did not differ significantly. From those findings, we concluded that delayed recovery of AVC after surgical TCHB (≥7 days), but not electrophysiologic properties of recovered AVC assessed early in the postoperative period strongly, predicts risk of LCHB. Follow-up evaluation of AVC is particularly indicated for the delayed recovery group.
Peter F Aziz; Gerald A Serwer; David J Bradley; Martin J Lapage; Jennifer C Hirsch; Edward L Bove; Richard G Ohye; Macdonald Dick
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-22
Journal Detail:
Title:  Pediatric cardiology     Volume:  -     ISSN:  1432-1971     ISO Abbreviation:  Pediatr Cardiol     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003849     Medline TA:  Pediatr Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Division of Pediatric Cardiology, C. S. Mott Children's Hospital, 1540 East Hospital Drive, Room 11-722, Ann Arbor, MI, 48109-5204, USA.
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