Right ventricular apical versus right ventricular outflow tract pacing: impact on left ventricular synchronization.
- Author:
Dongli CHEN
1
;
Jiaojiao TANG
;
Silin CHEN
;
Chunying LIN
;
Lie LIU
;
Qianhuan ZHANG
;
Yuanhong LIANG
;
Hu PENG
;
Yan CHEN
;
Huiqiang WEI
Author Information
- Publication Type:Journal Article
- MeSH: Cardiac Pacing, Artificial; methods; Heart; Heart Ventricles; Humans; Systole
- From: Journal of Southern Medical University 2014;34(10):1551-1554
- CountryChina
- Language:Chinese
-
Abstract:
UNLABELLEDObjective To compare the impact of right ventricular apical (RVA) versus right ventricular outflow tract (RVOT) pacing on left ventricular systolic synchronization.
METHODSSixty patients were prospectively recruited and randomized into RVA group (n=30) with the right ventricle leads placed in the RVA and RVOT group (n=30) with right ventricle leads placed in the septum of the RVOT. Speckle tracking imaging was performed with 100% ventricle pacing to measure the differences in the time to maximum left ventricle (LV) radial strain.
RESULTSIn RVA group, the difference in the time to 6-segment maximum LV radial strain after pacing was 105.27 ± 19.74 ms, significantly greater than that in RVOT group (41.65 ± 12.17 ms, P<0.001). The standard difference of time to 6-segment maximum LV radial strain was also significantly greater in RVA group than in RVOT group (42.71 ± 17.63 vs 17.63 ± 5.62 ms, P<0.001).
CONCLUSIONLeft ventricle systolic synchronizaition after RVOT pacing is superior to RVA pacing.
