Inclusion criteria will be patients aged 31-90 presenting with World Health Organization diagnosis of non-ST segment elevation myocardial infarction, which encompass 2 out of the following 3 criteria: a clinical history of chest pain unrelieved by nitroglycerin, ECG evidence of cardiac ischemia (ST segment depression or T wave inversion), and enzymatic evidence of myocardial infarction (elevation of TnI or CKMB). Patients should be clinically eligible for coronary angiography.