Clinical safety and feasibility research in patients with right ventricular septal

Objective To explore the clinical safety and feasibility of the technique that doctorsimplantscrew-in transv enous pacing lead in right ventricular septum. Methods There were 10 patients with chronic atrial fibrillation and long RR interval or slow ventri cu-lar beats who need receive permanent pacing, 7 male and 3female, the mean age was 64.20±12.61 years old; two of them were in normal heart function, three were in NYHA class Ⅰ , three was Ⅱ and two was Ⅳ. All of them had to receive ⅤⅥ pacing mode because of chronic atrial fibrillation. Firstly, we fixed screw -in pacing leads at right ventricular apex (RVA), about fifteen minutes later we determined pacing threshold; Secondly, we moved screw-in pacing leads form RVA to right ventricular septum (RVS) under X-ray and ECG suggestion. Results The screw -in pacing leads were im planted successfully at RVS in all patients and no complication occurred, such movement or dislodgernent of screw-in pacing lead. The average pacing threshold at RVS was satisfactory, the voltage was 0.73±0.36V, current was 1.14±0.44mA, resistance was 646.20±130.52Ω, R wave was 12.14±3.41mV. Conclusion: It' s safe and feasible in patients with chronic atrial fibrillation and long RR interval or slow ventricular beats to use screw-in leads for RVS pacing.