An Integrative Model of the Cardiovascular System Coupling Heart Cellular Mechanics with Arterial Network Hemodynamics.
10.3346/jkms.2013.28.8.1161
- Author:
Young Tae KIM
1
;
Jeong Sang LEE
;
Chan Hyun YOUN
;
Jae Sung CHOI
;
Eun Bo SHIM
Author Information
1. Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, Korea. ebshim@kangwon.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Computer Simulation;
Blood Pressure;
Hypertrophy, Left Ventricular;
Integrative Cell-System-Arterial Network Model
- MeSH:
Aorta/physiology;
Arteries/*physiology;
Blood Pressure;
Cardiovascular System/*physiopathology;
Computer Simulation;
*Hemodynamics;
Humans;
Hypertrophy, Left Ventricular/physiopathology;
*Models, Biological;
Ventricular Function
- From:Journal of Korean Medical Science
2013;28(8):1161-1168
- CountryRepublic of Korea
- Language:English
-
Abstract:
The current study proposes a model of the cardiovascular system that couples heart cell mechanics with arterial hemodynamics to examine the physiological role of arterial blood pressure (BP) in left ventricular hypertrophy (LVH). We developed a comprehensive multiphysics and multiscale cardiovascular model of the cardiovascular system that simulates physiological events, from membrane excitation and the contraction of a cardiac cell to heart mechanics and arterial blood hemodynamics. Using this model, we delineated the relationship between arterial BP or pulse wave velocity and LVH. Computed results were compared with existing clinical and experimental observations. To investigate the relationship between arterial hemodynamics and LVH, we performed a parametric study based on arterial wall stiffness, which was obtained in the model. Peak cellular stress of the left ventricle and systolic blood pressure (SBP) in the brachial and central arteries also increased; however, further increases were limited for higher arterial stiffness values. Interestingly, when we doubled the value of arterial stiffness from the baseline value, the percentage increase of SBP in the central artery was about 6.7% whereas that of the brachial artery was about 3.4%. It is suggested that SBP in the central artery is more critical for predicting LVH as compared with other blood pressure measurements.
