Abstract: Objective To explore and analysis the effects of active fixed electrodes on ventricular pacing parameters in patients undergoing pacemaker implantation. Methods A total of 85 cases of patients who were admitted to Korla Hospital of the Second Division of Xinjiang Production and Construction Corps from January 2020 to April 2023 and required the placement of an implantable pacemaker were selected as the research subjects. Accorded to the random dice principle, 85 patients were divided into the active group of 43 cases and the passive group of 42 cases. The active group were treated with right ventricular outflow tract septum and Higgins bundle pacing using active fixation electrodes, while the passive group were treated with right ventricular apical pacing using passive fixation electrodes. The changes in ventricular pacing parameters were recorded and observed in both groups. Results The ventricular pacing parameters-pacing threshold, impedance, and P-wave amplitude immediately after pacemaker implantation in the active group were significantly lower than those in the passive group (P<0.05), and the current were significantly reduced compared to the passive group (P<0.05). The electrode placement time and exposure time of the active group were significantly increased compared to the passive group (P<0.05). The incidence of pacemaker system infection, lower limb deep vein thrombosis, pacemaker electrode dislocation, pacemaker dysfunction and other complications were 2.33% in the active group and 19.05% in the passive group 7 days after electrode implantation, which were significantly lower in the active group than in the passive group (P<0.05). The lower limb immobilization time, hospitalization time, and temporary cardiac pacing electrode retention time in the active group were significantly reduced compared to the passive group (P<0.05). Conclusion The application of actively fixation electrodes in patients undergoing pacemaker implantation can improve ventricular pacing parameters,increase electrode insertion time and exposure time, reduce ventricular asynchronous electrical stimulation caused by right apex pacing, reduce the incidence of complications, and improve the overall prognosis of patients.

Key words: actively fixation electrodes, pacemaker implantation surgery, ventricular pacing parameters, right ventricular apex, passive fixation electrodes