Objective To compare the effects of different pacing proportion and pacing site,including right ventricular outflow tract(RVOT) and right ventricular apex(RVA),on the occurrence of ventricular high rate episodes(VHR) ...
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Objective To compare the effects of different pacing proportion and pacing site,including right ventricular outflow tract(RVOT) and right ventricular apex(RVA),on the occurrence of ventricular high rate episodes(VHR) and ventricular premature beat(PVC). Methods Patients accepted pacemaker implantation for sick sinus syndrome or AV block were selected in this study from Jan 2008 to Dec *** were randomized to RVOT group or RVA group according to the ventricular pacing *** recorded by pacemaker were collected during 12 months follow-up. Results 96 patients were enrolled in this study,48 ineach *** is no difference in baseline characteristic between two *** were divided to three groups according to the proportion of ventricular(VP):VP<10%,VP 11-89%and VP>90%.VHR and PVC decrease with the increase of ventricular pacing proportion both in RVOT group and RVA *** with RVOT group,there is high incidence of PVC in RVA group. Conclusion VHR and PVC decrease with the increase of *** pacing increase the frequency of PVC.
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