Mechanical principle of the respiration-driven variation of cardiac function:echocardiographic study of factors affecting the swing of interventricular septum
10.3760/cma.j.issn.1004-4477.2013.12.018
- VernacularTitle:呼吸影响心功能的力学原理—室间隔摆动影响因素的超声心动图研究
- Author:
Changyang XING
;
Yong YANG
;
Tiesheng CAO
;
Lijun YUAN
;
Yunyou DUAN
;
Yuanling LIU
;
Zhen WANG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Respiration;
Ventricular function;
Interventricular septum swing
- From:
Chinese Journal of Ultrasonography
2013;22(12):1067-1069
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the affecting factors of interventricular septum (IVS) swing by study of the mechanical model of the respiration-driven variation of cardiac function using echocardiography.Methods In present study,the equivalent mechanical model of septal swing in previous study was used.By changing the end-diastolic pressure difference between the simulated right and left ventricles and simulated intrapericardial pressure,the subsequent influences on IVS swing using echocardiography were observed.Results Under the rhythmic respiratory intrathoracic pressure change(RIPC)(0--4 mm Hg,1 mm Hg =0.133 kPa),the swing amplitude of simulated IVS increased with decrease of the simulated end-diastolic pressure difference between the simulated right and left ventricles (2.2-17.6 mm).With increasing of the simulated intrapericardial pressure,the simulated right ventricle and left ventricle collapsed in succession,the swing amplitude of simulated IVS also increased to a maximal amplitude of 22.4 mm.Conclusions The affecting factors of IVS swing including the magnitude of RIPC,the end-diastolic pressure difference between the two ventricles and the intrapericardial pressure.
