Discussion
The PVC response option is meant to avoid PVC-triggered PMT by the pacemakers. The major principle is to extend PVARP after PVC so as to curb the atrial arrhythmia caused by competitive AP[3]. A Pace on PVC function from St. Jude[4-6].
In this case report, Victory XL DR 5816, the Dual Chamber Pacemaker from St. Jude was implanted into the patient 3 years ago before this reported arrhythmia. The patient got interposition PVC frequently, triggering the special PVC response of the pacemaker. Resultantly, Sinus P wave lied within PAVB and then VP released in AVP, contributing to serious arrhythmia. Further, the sinus P wave occurred in CDW, which induced VSS, aggravating the arrhythmia symptoms.
Recent years witness the increasing special functions of pacemakers, all intended for the improvement in functions and safety. However, the connections between special functions and arrythmia make the ECG analysis more complicated. Clinical doctors need to get in-depth understanding of special functions of pacemakers and value the follow-up programming controls as well as logic analysis so as to enable themselves to customize the optimal programming control for each patient. Only by doing this, clinicians can provide optimal treatment for arrhythmia patients.