The time out of the VP-VP delay and delivery of the V-PACE2 are thereby suspended. [0084] FIGS. 6A-6B is a flow chart illustrating the steps S114 and S132 of FIG. 4 (when provided or enabled) for delivering ventricular pace pulses triggered by a ventricular sense event in step S108 during the time-out of an AV delay or in step S124 during time-out of the V-A escape interval.