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Abstract
Examination of the electrocardiogram is the most widely used means for diagnosis and early stratification of risk of acute myocardial infarction (AMI). (Myers G.B et al.,1948).
The classical classification of acute myocardial infarction according to various electrocardiographic patterns has been based mainly on reports comparing autopsy findings with the distribution of the pathological Q- waves, mainly during the chronic phase of infarction. (Hirazka T et al., 1949).
Acute anterior myocardial infarction was classified as septal if Q-waves were present in leads V1 and V2 ; anteroseptal if Q waves appeared in leads V1-V4; lateral if Q waves appeared in leads aVL, V5 and V6 and anterolateral if Q waves were present in leads aVL and V1-V3 ., extensive anterior if Q-waves were present in leads V1 – V6;. (Surawiez B et al.,1978).
However patients with anterior AMI and ST-segment elevation in leads V1-V3 were studied by two-dimensional echocardiography by Shalev et al, and found normal septal wall motion but an abnormality in the anteroapical wall motion in 92.3 % of the patients , they concluded that anterior myocardial infarction traditionally classified as anteroseptal are in fact anteroapical .(Shalev J et al.,1995).