Fig. 7.

Comparisons of area change ratio, circumferential strain, and longitudinal strain during baseline (Base), propranolol infusion (Prop), dobutamine infusion (Dob), and acute ischemia (Isc). Upper panels are corresponding to total data (Total), mid ones to mid anterior wall (Mid), and bottom ones to apical anterior wall (Apex). Area change ratio clearly distinguished changes in myocardial function induced by pharmacological stress and acute ischemia in both mid and apical anterior wall. ^*p < 0.001 vs. others.