Epicardial Coronary Capacitive Blood Flow

Autor:	John K-J. Li, Xiaoming Guan, Jingsheng Liao, J. Kedem
Rok vydání:	2005
Předmět:	Transplantation medicine.medical_specialty Materials science Mathematical model Capacitive sensing Linear model General Medicine Mechanics Blood flow Capacitance Viscoelasticity Nonlinear system Internal medicine medicine Cardiology Surgery Time domain Cardiology and Cardiovascular Medicine
Zdroj:	Cardiovascular Engineering. 5:119-125
ISSN:	1573-6806 1567-8822
Popis:	Several lumped models have been proposed to characterize the elastic behavior of the epicardial coronary artery, which are based on well-controlled animal experiments. It is still unclear as to which model is most suitable for analyzing the physiological pressure-flow data for the normal catheterization labs. In this research, different perfusion pressure patterns measured from a mongrel dog were used to drive four mathematical models to investigate the influence of the pressure dependence and viscoelastic effect on epicardial capacitive flow. Results show that the nonlinear behavior of the epicardial capacitance can be approximated with a linear model, and the viscoelastic effect only slightly reduces the amplitude of the protosystolic peak. Further analysis in frequency and time domain revealed the underlying mechanism for the above observation. We conclude that a constant capacitance model can be used to analyze the protosystolic data for estimating the epicardial capacitance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a0a1e7083adfcfc58a202d74d7dfb97d https://doi.org/10.1007/s10558-005-7672-2 Zobrazit plný text záznamu Full text from SpringerLink