The left main coronary artery arises from the left coronary cusp and bifurcates into the left anterior ... This ECG shows dramatic ST depression that is downsloping consistent with ischemia.

Left Bundle Branch Block If your cardiologist spots LBBB on an EKG, they may run tests to figure out the cause. Unlike RBBB, left bundle blocks are more often a sign of tissue damage.

Myocardial Ischemia after Ligation of an Anomalous Left Coronary Artery Arising from the Pulmonary Artery Authors : Nosrat A. Massih , M.D. , John Lawler , M.D. , and Margaret Vermillion , M.D ...