DIFFERENTIAL EFFECTS OF DOBUTAMINE AND EXERCISE ON LEFT VENTRICULAR VOLUMES DURING STRESS ECHOCARDIOGRAPHY

Stress echocardiography is deemed diagnostic with achievement of target heart rate (HR) (> 85% maximum predicted) or double product (DP) for exercise (ESE) and dobutamine (DSE). However both modalities affect the left ventricle (LV) differently. Exercise increases HR physiologically to increase