Cardiac Testing

Electrocardiography (ECG or EKG) measures the electrical activity of the heart and records information on heart rate and rhythm.
Exercise cardiac stress test involves walking on a treadmill or pedaling a stationary bike at increasing levels of difficulty. During this test, the doctor checks your heart rate and rhythm, blood pressure, and the electrical activity of your heart using ECG. This helps check if there is enough blood flow to your heart when it is stressed. If you cannot exercise, you will instead receive medication to make your heart beat harder and faster.
Echocardiography uses ultrasound to create moving pictures of the heart. In a stress echocardiography, ultrasound looks at the heart before and after it is stressed from exercise or medication.