Objective To access whether long-term right ventricular septal( RVS) pacing is superior to right ventricular apical( RVA) pacing in high heart block patient with left ventricular dysfunction. Methods Fifty-nine patients( 33 with RVS pacing,and 26 with RVA pacing) were recruited,whose left ventricular eject fraction( LVEF) were between 0. 35and 0. 50. Ultrasonic-cardiogram( UCG) confirmed a septal lead position in all patients in the RVS pacing group. Afer 1week and 6 months following implantation,LVEF,and l...