右室不同起搏部位对老年病窦综合征患者左心室收缩功能的影响

目的 比较右室不同起搏部位对老年病窦综合征(SSS)患者左心室收缩功能的影响.方法 选取该院2014-2016年收治的78例SSS患者,按照右室不同起搏部位分为右室心尖部(RVA)起搏组(40例)和右室流出道(RVOT)起搏组(38例),比较术前、术后3个月和术后9个月两组起搏器QRS波时限、总计右心室起搏百分比和左心室收缩功能指标.结果 两组患者术前QRS波时限和各项左心室收缩功能指标比较,差异均无统计学意义(P＞0.05).术后3个月和术后9个月,RVA起搏组患者QRS波时限较RVOT起搏组长,差异有统计学意义(P＜0.05).术后9个月两组总计起搏百分比比较,差异无统计学意义(P＞0.05);而RVOT起搏组左心室射血分数高于RVA起搏组,左心室舒张末内径小于RVA起搏组,差异均有统计学意义(P＜0.05).结论 RVOT起搏对SSS患者左心室收缩功能的作用优于RVA起搏.

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

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.