Your doctor will ask about your symptoms and medical history. You will have a physical exam. You may have one or more of these tests:

• Electrocardiogram (ECG) and exercise treadmill test (ETT): These tests show electrical changes in the heart muscle if it is getting too little oxygen.
• Nuclear heart scan: This scan measures blood flow in the heart.
• Stress echocardiogram: This test shows how a lack of blood oxygen affects the heart's ability to squeeze (contract).