Introduction
In practice, patients with implantation of earlier pacemakers have chances of PMT, which pushes the advances and enrichments in pacemaker special functions[1]. Producers developed PVARP extension mechanism to avoid detection of the retrograde P wave in order to prevent PMT occurrence[2]. Such innovations greatly help to prevent the PMT brought by the pacemakers. Yet, the special functions of pacemakers also induce unexpected arrhythmia in patients.
We reported one complex but not rare case that presented the negative outcomes derived from the combined functions of PVC and VSS of pacemakers.