Revascularization Versus Medical Treatment in Patients With Ischemic Left Ventricular Dysfunction

"Revascularization indication~1. Diameter stenosis \>90% by visual assessment~2. Functionally significant stenosis (FFR≤0.80 or non-hyperemic pressure ratios≤0.89)~3. Chronic total occlusion with substantial ischemic territory. The below locations will be judged as having substantial ischemic territory.~ * Left main artery~ * Proximal to mid left anterior descending artery~ * Proximal left circumflex artery in left dominant coronary arterial system~ * Proximal to distal right coronary artery in right dominant coronary arterial system"