Relationship between electrocardiographic pattern and angiographic findings in inferior myocardial infarction

The relationship between electrocardiographic pattern and angiographic features was assessed in 86 patients with inferior myocardial infarction. Although the occurrence of inferior Q wave was similar in patients with isolated left circumflex (LCX) or right coronary artery (RCA) occlusion, lateral Q wave and abnormal R wave in lead V1 were more frequent in the former. In patients with LCX-related infarction, abnormal R wave in lead V1 associated with inferior and/or lateral Q waves may indicate left ventricular dysfunction, total occlusion of the LCX without collateral circulation, and high cardiac event rate during longterm follow-up.