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Abstract
ECG is commonly used as an early noninvasive tool for diagnosing acute myocardial infarction because of its widespread accessibility low cost and simplicity of operation.
The classification of anterior wall myocardial infarction (AMI) is based historically on autopsy findings in the sub acute and chronic phases of infarction and their correlation with electrocardiographic (ECG) patterns (Parker AB et al., 1996).
Acute anterior myocardial infarction is commonly classified as septal when Q waves are present in leads V1 and V2, anterior when Q waves are present in leads V3 and V4, anteroseptal if Q waves are in V1-V4, lateral when Q waves are in leads V5,V6,I and AVL, and anterolateral when Q waves appear in leads V3-V6 and AVL (Surawicz B et al., 1978).
Although most anterior myocardial infarctions involve the left ventricular apical regions, ECG identification of apical infarction is controversial and has several different definitions. (Wagner GS et al., 2001).
Several studies have shown that although predicting the general location of the infarction, the ECG is not reliable in providing detailed information concerning the exact size and localization of the infarction (Rothfeld B et al., 1984). Nevertheless the traditional ECG classification of anterior wall acute myocardial infarction is widely used in clinical practice.