Clinical features of patients with reperfused inferior wall acute myocardial infarction complicated by early complete atrioventricular block

We studied the clinical features of patients with reperfused inferior wall acute myocardial infarction who had complete atrioventricular block within 6 hours after symptom onset. Patients with a rapid atrial rate (>75 beats/m in) during complete atrioventricular block had more severe myocardial damag e and greater microcirculatory reperfusion injury, resulting in a larger in farct size; those with a slow atrial rate (less than or equal to 75 beats/ min) had less myocardial damage, subsequent myocardial reperfusion, and a s maller infarct size despite a similar area at risk.