Reversibility of Atrioventricular Block According to Coronary Artery Disease: Results of a Retrospective Study

다국어 초록 (Multilingual Abstract)

Background and Objectives: The causal relationship of clinically-significant atrioventricular block (AVB) and coronary artery disease (CAD)is uncertain. We investigated whether CAD is related to irreversible AVB that requires treatment with a permanent pacemaker.
Subjects and Methods: We included 188 consecutive patients with new-onset AVB considering pacemaker, who had undergone invasive or noninvasive coronary evaluation. Patients were divided into one of 2 groups: irreversible AVB who underwent implantation of perma-nent pacemaker {irreversible block (IB) group, n=173} or reversible AVB {reversible block (RB) group, n=15}.
Results: In IB group, significant CAD was observed in 44 patients (25.4%) and there were 2 (1.2%) patients with acute myocardial infarc-tion (AMI). In RB group, 14 patients (93.3%) had CAD (p<0.001) and 13 patients (86.7%) presented with AMI (p<0.001). On the aspect of CAD type and reversibility of AVB, 13/15 (86.7%) patients of AMI, 0/2 (0%) of unstable angina, and 1/41 (2.4%) of stable angina had re-versible AVB.
Conclusion: AVB in patients with AMI is usually reversible. Therefore, permanent pacemaker implantation should be delayed in cases of AMI. AVB in patients with CAD other than AMI is usually irreversible.

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