Effects of cardiac resynchronization therapy on right ventricular function in patients with congestive heart failure by 2-dimensional speckle tracking imaging
10.3760/cma.j.issn.1004-4477.2013.11.002
- VernacularTitle:二维斑点追踪成像评价再同步化治疗对慢性心力衰竭患者右心室功能的影响
- Author:
Jinling CHEN
;
Fengxia JIANG
;
Sheng CAO
;
Hongning SONG
;
Ruiqiang GUO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Heart failure,congestive;
Ventricular function,right;
Cardiac resynchronization therapy;
Speckle tracking imaging
- From:
Chinese Journal of Ultrasonography
2013;22(11):927-931
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the right ventricular function in patients with congestive heart failure (CHF) after cardiac resynchronization therapy (CRT) by 2-dimensional speckle imaging (2D-STI).Methods 46 patients with CHF were divided into responders to CRT and non-responders to CRT according the standard of a decline in LV end-systolic volume ≥ 10％.All the patients received echocardiography examination 1-3 days before CRT and 6 month after CRT.Tissue Doppler imaging (TDI) indices included SD of time to peak velocity in systole (Ts-SD) among 12 segments.Right ventricular diameters included RV basal transverse diameter (D1),RV middle transverse diameter (D2) and RV longitudinal diameter (D3) in apical four views.2D-STI indices included systolic strain (S) and stain rate (SR) of basal or middle segment of RV free wall.Results Compared with before CRT,LVEDd,LVEDV,LVESV and Ts-SD significantly decreased,LVEF significantly increased in responders 6 months after CRT.Before CRT,compared with nonresponders,there was no significant difference of D1,D2 and D3 in responders,while S and SR in basal or middle segment of RV free wall were higher than non-responders.Compared with before CRT,D1,D2 and D3 in responders decreased significantly,S and SR in basal or middle segment of RV free wall increased significantly,while there was no difference in non-responders.There were significant negative correlation between S and SR in basal or middle segment of RV free wall and Ts-SD in responders.Conclusions The remodeling and systolic function of RV are improved after CRT.It may help for improving the efficacy of CRT when takes RV function data into account before CRT.
