关键词: 右心室, 肺动脉, 动态耦合, 输入阻抗, 轻微非对称T型管模型, 分布参数

Abstract: Based on the anatomical structure of pulmonary arteries, a slightly asymmetric T-tube model with distributed parameters is proposed herein to simulate the pulmonary arteries. Comparison between our calculated input impedance to the pulmonary arteries with available experimental data proves that such a model provides an excellent simulation to the right ventricular afterload. With a E(t)-R model for the right ventricle and a slightly asymmetric T tube model for the pulmonary arteries, the dynamic coupling of the right ventricle and pulmonary circulation is quantitatively studied using the impulse response method. The influence of various cardiovascular parameters is discussed. It is found that the right ventricle plays a predominant role over the pulmonary arteries in determining the pulmonary blood pressure and flow variations during a cardiac cycle.

Key words: right ventricle, pulmonary arteries, dynamic coupling, input impedance, slight asymmetric T tube model, distributed parameters