Fig. 2

Representative stress phase histograms, phase map, and polar map images of a patient without LV mechanical dyssynchrony (A) and a patient with severe LV mechanical dyssynchrony (B). Patient A had improved LVEF on echocardiography after 6 months of HF treatment. Patient B had not improved LVEF on echocardiography after 6 months of HF treatment
LV, left ventricular; LVEF, left ventricular ejection fraction; HF, heart failure; SPBW, stress phase bandwidth; SD, standard deviation