2. The use of ultrasound to examine and measure the structures and functioning of the heart and to diagnose abnormalities and disease. ECHOCARDIOGRAPHY
3. An electrocardiographic test of heart function before, during, and after a controlled period of increasingly strenuous exercise. STRESS TESTING
4. A technique for detecting the movement of blood flow. It allows an examiner to hear characteristic alterations in blood flow caused by vessel obstruction in various parts of an extremity. DOPPLER ULTRASONOGRAPHY
