Study of left ventricular systolic volume and synchrony in patients with premature ventricular complexes from the right ventricular outflow tract by instantaneous full-volume imaging
10.3760/cma.j.issn.1004-4477.2011.05.001
- VernacularTitle:单心动周期全容积成像对右心室流出道起源室性期前收缩患者左心室容积及收缩同步性的研究
- Author:
Jing YAO
;
Di XU
;
Fengxiang LU
;
Yonghong YONG
;
Hongping WU
;
Meijuan LU
;
Jian HONG
;
Liang XU
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular premature complexes;
Ventricular function,left;
Instantaneous full-volume imaging
- From:Chinese Journal of Ultrasonography
2011;20(5):369-373
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess alternations in left ventricular volume and systolic synchrony in patients with frequent premature ventricular complexes(PVCs) from the right ventricular outflow tract(RVOT).Methods Twenty-nine patients with frequent isolated PVCs from RVOT were included and 30 healthy subjects as control.Instantaneous full-volume imaging(IFI) was performed to evaluate left ventricle volumetric parameters,including end-systolic volume (ESV),end-diastolic volume (EDV),stroke volume (SV),ejection fraction (EF),and systolic synchrony parameters,including systolic dyssynchrony index (SDI),dispersion end-systole (DISPES),mean end-systolic time (MES),pre-contraction time volume (PreContr) and post-contraction time volume (PostContr).Contraction front mapping was performed to visualize volumetric contraction sequence.All values of patients with PVCs were recorded during sinus beats (PVC-S) and premature ventricular beats (PVC-V) respectively.Results Significant differences were observed in left ventricular systolic volumetric and synchrony parameters between PVC-V and control subjects (P＜0.01),as well as in MES and PreContr between PVC-S and control subjects (P＜0.01).Conclusions Left ventricular systolic dysynchrony was demonstrated in patients with PVCs from RVOT.IFI was a novel tool to analyze left ventricular global and regional volumetric alternations.
