ELECTROCARDIOGRAPHIC DIAGNOSIS OF LEFT CIRCUMFLEX ARTERY-OCCLUSION AND THE OCCLUSION SITE

In patients with a posteroinferior acute myocardial infarction and bot h ST depression (in lead V1 or V2) and ST elevation in the inferior le ads, it is difficult to differentiate a left circumflex artery occlusi on from a right coronary artery occlusion. Furthermore, there is no us eful method to identify the obstruction site in the left circumflex ar tery. In a study of 52 patients with single-vessel left circumflex art ery disease, ST elevation in V6 was found to be a useful indicator for left circumflex artery occlusion in such patients. Furthermore, the s um of the ST changes in leads a VF and V2 is useful for identifying th e occluded site in the left circumflex artery.