The left heart catheterization with IV radioactive dye is the gold standard for the detection of coronary atherosclerosis and left ventricular (LV) ejection fraction during the LV gram. Other noninvasive tests include a positron-emission tomography (PET) scan. Computerized axial tomography (CT) of the chest and two-dimensional echocardiogram that can determine cardiac ejection fraction (EF) of the heart.