In patients with baseline ECG abnormalities, a<unk><unk>  test can be used to localize the region of ischemia. Thallium-201 and technetium-99m are the two radio-labeled agents that are frequently used for the assessment of<unk><unk> .<unk>  uptake of thallium-201 chloride is directly proportional to the regional<unk>  blood flow and is dependent on the presence of viable myocardium. In patients with known CAD, a normal thallium stress test without a<unk>  defect is indicative of a benign process and associated with excellent prognosis. Patients with a normal thallium scan are at low risk for CAD and subsequent coronary angiography is indicated only if the patient has a high probabilty Duke treadmill score. Contraindications for thallium stress test include the presence of arrhythmia, acute myocarditis, severe aortic stenosis and acute MI within the past 2 days.
Chronic stable angina myocardial perfusion scintigraphy
Chronic stable angina electron beam tomography
Chronic stable angina positron emission tomography 
Chronic stable angina coronary angiography
Chronic stable angina echocardiography
Chronic stable angina cardiac magnetic resonance imaging
Chronic stable angina exercise echocardiography
Chronic stable angina electrocardiography