Primary percutaneous coronary intervention ameliorates complete atrioventricular block complicating acute inferior myocardial infarction
Received 10 September 2014
Accepted for publication 22 October 2014
Published 24 November 2014 Volume 2014:9 Pages 2027—2031
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 3
Editor who approved publication: Dr Richard Walker
Su Nam Lee, You-Mi Hwang, Gee-Hee Kim, Ji-Hoon Kim, Ki-Dong Yoo, Chul-Min Kim, Keon-Woong Moon
Department of Internal Medicine, St Vincent’s Hospital, The Catholic University of Korea, Suwon, South Korea
Objective: Complete atrioventricular block (CAVB) in acute inferior ST-segment elevation myocardial infarction (STEMI) is associated with poor clinical outcomes after noninvasive treatment. This study was designed to determine the effect of primary percutaneous coronary intervention (PCI) in patients with CAVB complicating acute inferior STEMI, at a single center.
Methods: We enrolled 138 consecutive patients diagnosed with STEMI involving the inferior wall; of these, 27 patients had CAVB. All patients received primary PCI. The clinical characteristics, procedural data, and clinical outcomes were compared in patients with versus without CAVB.
Results: Baseline clinical characteristics were similar between patients with and without CAVB. Patients with CAVB were more likely to present with cardiogenic shock, and CAVB was caused primarily by right coronary artery occlusion. Door-to-balloon time was similar between those two groups. After primary PCI, CAVB was reversed in all patients. The peak creatinine phosphokinase level, left ventricular ejection fraction and in-hospital mortality rate were similar between the two groups. After a median follow up of 318 days, major adverse cardiac events did not differ between the groups (8.1% in patients without CAVB; 11.1% in patients with CAVB) (P=0.702).
Conclusion: We conclude that primary PCI can ameliorate CAVB-complicated acute inferior STEMI, with an acceptable rate of major adverse cardiac events, and suggest that primary PCI should be the preferred reperfusion therapy in patients with CAVB complicating acute inferior myocardial infarction.
Keywords: major adverse cardiac events, PCI-capable hospital
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