Effects of different right ventricular pacing sites on left ventricular systolic function in elderly patients with sick sinus syndrome / 重庆医学

ABSTRACT

Objective To compare the effects of different right ventricular pacing sites on left ventricle systolic function in elderly patients with sick sinus syndrome (SSS).Methods A total of 78 elderly patients with SSS were selected in our hospital from 2014 to 2016,and were divided into the right ventricular apical group (RVA group,40 cases) and right ventricular outflow tract group (RVOT group,38 cases) according to sites of right ventrieular pacing.The QRS duration,accumulative total right ventricular pacing percentage and left ventricle function indicators were compared between the two groups before operation and 3,9 months after operation.Results There was no statistically significant difference in QRS duration and left ventricle function indicators before operation between the two groups (P＞0.05).The QRS durations in the RVA group at 3,9 months after operation were longer than those in the RVOT group,there were statistically significant differences (P＜0.05).No statistically significant difference was found in accumulative total right ventricular pacing percentage at 9 months after operation between the two groups (P＞ 0.05).At 9 months after operation,the left ventricular ejection fraction in the RVOT group was higher than that in the RVA group,and the left ventricular end diastolic diameter was lower than that in the RVA group,there were statistically significant differences (P＜0.05).Conclusion The effects of RVOT pacing on left ventricle systolic function in elderly patients with SSS is superior to the RVA pacing.