10. STRESS TESTING EVALUATES CARDIOVASCULAR FITNESS. PATIENT IS PLACED IN A TREADMILL OR ASKED TO PERFORM ALTERNATE EXERCIZE WHILE STEADILY INCREASING LEVEL OF DIFFICULTY.
11.
12. DOCTORS CAN TELL WHETHER THERE IS ADEQUATE BLOOD FLOW TO THE HEART.
16. ELECTROCARDIOGRAPHY MEASURES THE ELECTRICAL ACTIVITY OF THE HEART OVER A PERIOD OF TIME. ELECTRODES ARE ATTACHED TO THE SURFACE OF THE SKIN BY A DEVICE THAT IS EXTERNAL TO THE BODY.