The Complete Cancellation of Abnormal Q Waves Due to an Old Anteroseptal Infarction Following Subsequent Acute Posterior Myocardial Infarction

Abstract

A rare case of multiple infarction is described. An abnormal Q wave due to an old anteroseptal infarction was completely masked by a new contralateral posterior myocardial infarction. Coronary angiogram revealed multiple stenoses of segments 1 (100%), 7 (99%), 12 (90%) and 13 (99%). Left ventriculography also showed akinesis of segments 2, 3, 4 and 6, and reduced wall motion in segments 1, 5 and 7. These findings, together with electrocardiographic changes from before the present attack reinforce the above interpretation.