Nuclear Cardiology Procedures

MUGA Scan or Multi Gated Acquisition Scan is a nuclear medicine test to evaluate the function of the heart ventricles. It is also called Radionuclide Angiography. It provides a movie-like image of the beating heart, and allows the doctor to determine the health of the heart's major pumping chambers. The advantages of MUGA is that it is more accurate than an echocardiogram and it is non-invasive.

Shows how your heart performs during exercise or other activities that would make the heart work harder. This test can show if there is reduced blood flow in the arteries that supply the heart. For patients who cannot exercise on a treadmill, there are medications that your doctor can give you intravenously (through an IV) to "simulate exercise". These medications may increase the heart rate or dilate the heart arteries to make it easier for blood to flow in normal arteries, abnormal arteries will not receive as much blood flow and this can be detected with the nuclear camera.

T Wave Alternans or TWA are periodic, beat-to-beat variations in the amplitude of the T wave in an electrocardiogram (ECG). Most modern references to TWA refer to microvolt T-wave alternans (MTWA), a non-invasive heart test that can identify patients who are at increased risk of sudden cardiac death. It is most often used in patients who have had myocardial infarctions (heart attacks) or other heart damage to see if they are at high risk of developing a potentially lethal cardiac arrhythmia. Those who are found to be at high risk would therefore benefit from the placement of a defibrillator device which can stop an arrhythmia and save the patient's life.

Wall Motion Analysis is important in the detection of heart dysfunction. The test uses 3D ultrasound to view the heart's wall motion resulting in a set of vectors normal to the endocardial surface. The 3D motion coding technique allows for a precise quantitative analysis of the heart function and the 3D reconstruction improves the diagnosis by visualizing and localizing the whole dysfunctional region in relation to the rest of the ventricular structure.