Fig. 6

Changes in pressure and LV volume with time under the LBBB (a) and CRT (b) conditions. CRT increased systolic LV pressure from 120 to 124 mmHg and decreased LV end-systolic volume from 116 to 104 mL, that resulted in increased LVEF from 33 to 40%. CRT = cardiac resynchronization therapy, LBBB = left bundle branch block, LV = left ventricle, LVEF = left ventricular ejection fraction