Criteria of Anterior and Anterolateral Myocardial Infarction
1. Absent R wave in V2-V5 (QS wave).
2. ST segment elevation in these leads in acute infarction.
3. T wave inversion in these leads in old or evolving infarction.
4. Q waves in leads I, aVL and V6 with ST segment elevation in these leads is evidence of additional infarction of the high anterior lateral wall.
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[EKG Atlas]