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

There probably is a reduction in the mid-basal and mid-apical regions of the septal side of the anteroseptal myocardial wall, and in the mid-basal and mid-apical regions of the anterior side of the anteroseptal myocardial wall.