Role of gated myocardial perfusion scintigraphy in pre-operative cardiac risk stratification for non-cardiac surgery in cancer patients.Coronary artery disease (CAD) is a silent killer that may go undetected for years. It is the leading cause of death at the same time cancer by itself is associated with coagulation disorders due to hypercoagulable state and can cause coronary thromboemboli. However, there is no definite evidence that cancer by itself predisposes to coronary atherosclerosis. Optimal management of cancer patients with such known risk factors for coronary artery disease