40 year old male patient presents to the Emergency depament with central chest pain for 2 hours. The ECG shows ST segment depression and cardiac troponins are elevated. Patient has a positive history of previous PCI 3 months back. He is administered Aspirin, Clopidogrel, Nitrates and LMWH, in the Emergency Depament and shifted to the coronary are unit. The best recommended course of fuher action should include.