2013•The Chinese Journal of Cardiac Pacing and ElectrophysiologyRequires access
Influence of ventricular intrinsic preference algorithm on the percentage of right ventricular pacing and heart function
Cai Zhen-ron
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Abstract
Objective To investigate the impacts of ventricular intrinsic preference( VIP) algorithm on percentage of right ventricular pacing and heart function. Method Patients received permanent cardiac pacemaker for bradyarrhythmias were enrolled. Atrial leads were placed at right atricular appendage,ventricular leads were placed at right ventricuIar apex. The subjects were divided into experimental group and control group according to the functiong of VIP switched on or off. the concentration of brain natriuretic peptide( BNP). Left atrial diameter( LAD),left ventricular ejection fracetion( LVEF),left ventricular end diastolic diameter( LVEDD) were measured before operation and 12 months after implanting. The percentage of right ventricuIar pacing,the echocardiography parameters,the concentration of BNP and the distance of 6-minutes walking test at implantation and after implantation were compared respectively. Result A total of 62 patients were divided into experimental group( n = 30) and control group( n = 32). At 12 months after operation,the percentage of right ventricular pacing in experimental group decreased signifcantly compared with the control group[( 21. 43% ± 8. 57%) vs( 55. 26% ± 12. 36%),P 0. 001],LAD and LVEDD in control group were significantly larger,LVEF and the distance of 6-minutes walking test in control group were significantly lower( P 0. 05),the concentration of BNP in control group was higher than that in experimental group( P 0. 05). Conclusion VIP algorithm can effectively reduce the percentage of ventricular pacing,and protect heart function.[Chinese Journal of Cardiac Pacing and Electrophysiology,2014,28( 1) : 21-23]