- 作者：Ngai-Yin Chan ; Ho-Chuen Yuen ; Chi-Chung Choy ; Ngai-Shing Mok ; Ping-Tim Tsui ; Chun-Leung Lau ; Ying-Keung Lo ; Pui-Shan Chu ; Hoi-Fan Chow
- 关键词：Electrocardiography ; Cardiac pacing ; Right ventricular septal pacing ; Right ventricular apical pacing ; Left ventricular volumes ; Left ventricular remodelling
- 刊名：Heart, Lung and Circulation
- 出版年：January, 2014
- 年：2014
- 卷：23
- 期：1
- 页码：43-48
- 全文大小：155 K
Background
Long-term right ventricular apical (RVA) pacing causes adverse left ventricular (LV) remodelling and clinical outcomes.Methods
Forty-one patients (19 men, mean age 70.9 卤 14.2, 23 right ventricular septal and 18 RVA pacing) underwent pacemaker implantation for atrioventricular block. LV volumes and left ventricular ejection fraction (LVEF) were assessed by echocardiography 39.3 卤 17.2 months after implantation. Predictors of left ventricular systolic volume (LVESV), left ventricular diastolic volume (LVEDV) and LVEF were analysed.
Results
No difference was found between RVA pacing and right ventricular septal pacing groups in LVESV (40.6 卤 22.6 vs 33 卤 14.4 ml; p = 0.199), LVEDV (88.2 卤 31.2 vs 73.7 卤 23.9 ml; p = 0.102) and LVEF (56.1 卤 8.6 vs 56 卤 6.6%; p = 0.996). With multivariate stepwise regression, only pQRSd and renal impairment independently predicted LVESV (尾 = 0.522, 95% CI: 0.242-0.802; p = 0.001 and 尾 = 40.3, 95% CI: 17.6-62.9; p = 0.001 respectively), LVEDV (尾 = 0.786, 95% CI: 0.338-1.235; p = 0.001 and 尾 = 42.8, 95% CI: 6.6-79; p = 0.022 respectively) and LVEF (尾 = 鈭?.161, 95% CI: 鈭?.283 to 鈭?.04; p = 0.011 and 尾 = 鈭?4.8, 95% CI: 鈭?4.6 to 鈭?.0; p = 0.004 respectively).
Conclusions
pQRSd and renal impairment, but not pacing site or baseline LVEF, may be predictors for LV volumes and systolic function after long-term RV pacing. pQRSd may be target for pacing site optimisation.