A new way to study the motion of interventricular septum by echocardiography

VernacularTitle:超声心动图观察室间隔运动新方法研究
Author: Xianghong LUO ; Tiesheng CAO ; Yunyou DUAN ; Zhaojun LI
Publication Type:Journal Article
Keywords: Echocardiography,Ventricular septum; Respiration; Radius of curvature
From: Chinese Journal of Ultrasonography 2009;18(2):93-95
CountryChina
Language:Chinese
Abstract: Objective To evaluate the effect of normal respiration on motion and disfiguration of interventricular septum (IVS) by observing the change of interventricular septum radius of curvature (IVSRC). Methods The 2D short-axis images at chordae tendineae of mitral valve were recorded during inspiration and expiration respectively by Acuson Sequoia 512 in 21 normal subjects. Speed of blood flow of each valve, electrocardiogram and respiratory tracing were recorded simultaneously. Two doctors who were double-blind measured the IVSRC using self-designed software. Results During normal inspiration, the peak E velocity of mitral valve and the flow velocity of aortic valve decreased,while the peak E velocity of tricuspid valve and the flow velocity of pulmonary valve increased. The IVSRC curvatures were (25.914± 6.082)mm during inspiration, and (22.296±4.398)mm during expiration, there was difference in two respiration phases(P <0.0001). Conclusions IVSRC can be used to evaluate motion and disfiguration of IVS. It has a good repeatability and is an effective way to observe the change of pleural pressure which is produced by respiration.