Abstract
The mechanisms of the so-called extensive anterior acute myocardial infarction including ST-segment elevation in leads V 1 (ST↑ V1) through V 6 (ST↑ V6) are not clear. This report is focused on the electrocardiographic (ECG) changes in 2 cases with anterior AMI. In case 1, the ECG showed complete right bundle-branch block, left anterior fascicular block, and ST↑ V2 through ST↑ V6 on admission, but 5 minutes later, after the disappearance of complete right bundle-branch block and left anterior fascicular block, a striking ST depression in V6 (ST↓ V6) and ST↑ V1 occurred. In case 2, the ECG showed ST↑ V1 through ST↑ V6. The physiopathologic mechanisms of these ECG findings are discussed.
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