What is your approach to correlating stenotic lesions on coronary angiography to magnitude of decline in LV systolic function or cardiomyopathy severity when deciding to intervene or medically manage stable ischemic heart disease as an outpatient?

I use a combination of EKG, ECHO, Stress test, and viability (nuclear or MRI) to correlate the stenotic lesion to ischemic/hibernating/infarcted myocardium. I would only intervene if there is a large amount of ischemic/hibernating myocardium in the area supplied by the stenotic artery. I also use FF...