Imaging and Diagnostic Testing The St. Joseph Heart Institute's team of specialists employ a full range of tests to make an accurate diagnosis of your situation. Angiography Cartoid Doppler Coronary CT Echocardiography Electrocardiogram – EKG/ ECG Electrophysiologic Study Event Recorders Lower Extremity Arterial and Venous Testing Nuclear Stress Test Stress Echocardiography Tilt Testing