Is there a cut off time to consider the question of myocardial viability in ACS patients with depressed LV function before proceeding with PCI? Can we proceed with immediate PCI in ACS patients with depressed LV function (LVEF<40%) who have intermediate or high TIMI risk score, but are currently asymptomatic and stable and coronary angiogram done after 24-72 hrs of presentation identifies the culprit coronary (no total occlusion) or should we stop after angiogram and get non invasive myocardial viability and ischemia testing done and do PCI as a staged procedure after establishing viability? This question is not about mode of revascularization (CABG Vs PCI) but about timing of revascularization in presence of depressed LV function in ACS population.