If there is a reduction of counts in the basal, mid-basal or mid-apical regions of the anterior and lateral sides of the anterolateral myocardial wall, then there is evidence of a perfusion defect in the anterolateral myocardial wall.

There probably is a reduction in the mid-apical region of the anterior side of the anterolateral myocardial wall, and in the mid-apical region of the lateral side of the anterolateral myocardial wall.