The Circuit Modeling Of Cardiovascular System And Study Of The Biological Effects Of Electromagnetic

With the rapid development of science and technology, electromagnetic radiation has become an important hidden danger to people's health. After a long period of research, scholars at home and abroad have found that electromagnetic fields do have an impact on the cardiovascular system, and therefore, the impact is necessary to be studied.Based on the arguments of the physiological knowledge and the basic method of modeling of the cardiovascular system, this paper employs the methods of establishing the circuit model and simulating to study the impacts of electromagnetic fields on the cardiovascular system. It analyses the circuit model of the heart and arterial system and the mathematical model of the depressurized reflection of carotid sinus - aortic arch mechanism in the neural adjustment. From the perspectives of energy and hemodynamics, it details the coupling mechanisms in physiology, afterward, according to the compared relationship between the basic parameters of blood flowing and the electrical parameters, the circuit models of the heart and arterial system are coupled, besides, it is simulated with MATLAB. On the ground that the major impact of electromagnetic fields on the cardiovascular system is the neural regulation, it adds the mathematical model of the mechanism of neural regulation, simulates and analyses under normal physiological simulation. And the results fully consistent with the physiology of the heart pump mechanism, which illustrates that the cardiovascular system established in this paper is feasible and the circuit model accords with the normal physiological situation of the human body. Through the analysis of the mechanism of electromagnetic biological impacts on the cardiovascular system, the epidemiological investigations, and the animal experiments, it is found that the electromagnetic field will cause the changes of the sympathetic efferent impulse and vagal efferent impulse. Whereafter, the parameters of the model are adjusted accordingly, and the circuit model is simulated from the three aspects of the peripheral vascular resistance, myocardial contractility and cardiac cycle. It is described quantitatively with data that the electromagnetic field do affect the cardiovascular system and will induce diseases.