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(a) LV dyssynchrony (QRS-to-Peak LV radial strain), (b) stroke volume and (c) dP/dtmax in premature ventricular beats (PVC) arranged by different origin (RV, RVOT and LV) at 200, 250, 300 and 375ms and rapid pacing (RP) at 400ms, in addition to premature atrial beats (PAC) at 200ms (R-R interval 290–340ms). RV= RV apex, RVOT= RV outflow tract, LV = LV free wall.
