The below ECG tracing is from a patient with an acutely occluded left main coronary artery. This ECG shows dramatic ST depression that is downsloping consistent with ischemia. The changes are ...

on measurements of coronary flow reserve or objective evidence of ischemia in the distribution of the stenotic epicardial conduit artery. (Chowdhury M, et al. Curr Treat Options Cardiovasc Med.