Quantitative measurement of the aortic-mitral angle by real-time three-dimensional transesophageal echocardiography
10.3877/cma.j.issn.1672-6448.2017.11.014
- VernacularTitle:经食管实时三维超声心动图测量主动脉瓣环与二尖瓣环间夹角
- Author:
Guyue LIU
1
;
Xin WEI
;
Xi LI
;
Fang WANG
;
Yuyan CAI
;
Hong TANG
Author Information
1. 四川大学华西医院心内科
- Keywords:
Echocardiography,transesophageal;
Aortic-mitral angle;
Aortic valve;
Mitral valve
- From:
Chinese Journal of Medical Ultrasound (Electronic Edition)
2017;14(11):866-869
- CountryChina
- Language:Chinese
-
Abstract:
Objective To quantitatively investigate the dynamic changes of aortic-mitral angle (AMA) using real-time three-dimensional transesophageal echocardiography (RT3D-TEE) in the whole cardiac cycle. Methods RT3D-TEE was performed in 19 patients in West China Hospital of Sichuan University in January to March 2016. Custom software of Acuson-4.0 eSie Valves was used to detect and track the mitral and aortic annuli in 3D space throughout the cardiac cycle, allowing automated measurement of changes in AMA. The dynamic changes of AMA during a whole cardiac cycle were observed using paired t test. And the inter-observer and intra-observer variability were evaluated by Bland-Altman analysis. Results AMA was smaller in systole than in diastole (111.35°±10.68°vs. 118.14°±10.89°, t=-2.56, P < 0.05).The inter-observer and intra-observer repeatability were good,and the 95% confidence interval was (-6.6°, 5.6°) and (-7.1°, 8.7°) (r=0.80, P=0.0055 and r=0.69, P=0.0283). Conclusions Quantitative measurement of the AMA by RT3D-TEE is feasible, with good inter-observer and intra-observer agreement. These parameters may contribute to the implementation of the aortic or mitral valves replacement.
