Abstract: A biventricular pacing system incorporates a premature ventricular contraction (PVC) response. The biventricular pacing system also includes a programmable ventricular blanking period (VBP) that is initiated with the PVC response. During the programmed VBP, ventricular events are effectively blanked out. This prevents both ventricular leads from each independently initiating a dual PVC response, based on the same PVC event.