Clinical study of wave intensity in assessing short-term effects of cardiac resynchronization therapy
10.3760/cma.j.issn.1004-4477.2010.09.010
- VernacularTitle:瞬时波强技术评价心脏再同步化治疗术后短期疗效的临床研究
- Author:
Liwen LIU
;
Bin MA
;
Jun ZHANG
;
Haibin ZHANG
;
Yunyan DUAN
;
Xiaodong ZHOU
;
Ting ZHU
;
Liping YANG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Heart failure,congestive;
Cardiac resynchronization therapy;
Wave intensity
- From:
Chinese Journal of Ultrasonography
2010;19(9):761-764
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the clinical application of wave intensity (WI) technique in assessing the short-term effects of cardiac resynchronization therapy(CRT). Methods Sixteen patients with congestive heart failure treated with CRT were chosen. Before the implantation of CRT pacemaker and 1 week, 1 month,3 month after it,the diameters and volumes of left ventricle(LV) in the end-diastole and the end-systole were measured by echocardiography. LV ejection fractions(LVEF) were calculated by Simpson's way,and the variation ratio of left ventricular end-systolic volume(△ESV) was assessed each time after the CRT. The maximal rate of LV pressure rise (LVdP/dtmax) was assessed in the continuous-wave Doppler spectrum of mitral regurgitation. The magnitude of W1, and the length of R-W1 interval as well as W1-W2interval were recorded by WI technique applied on the left carotid artery of each patient. Results Compared to the data before CRT,W1 and W1-W2 interval were significantly higher in different period after CRT (P ＜0. 01). This result was conformed with echocardiographic remodeling data and LV systolic function.Conclusions WI provides a potential usage in conveniently and effectively assessing the CRT effects in short-term.
