DYNAMIC PROCESS OF HEARd WORKING -A PRINCIPLE OF LEAST CARDIAC WORK WITH CARDIAC KINETIC ITEM
心脏作功的动力学过程──考虑动功率的最小功原理

The principle of least cardiac work is a valid model which describes the dynamic process when the heart is working. In the previous study1],analytic solutions of the cardiac process were abtained, but during heart working,specially on some pathological conditions,the kinetic power takes certain percent of the total power.So,when we analyse the cardiac dynamic process,we should analyse the total cardiac work.When the kinetic power was calculated,the equations are changed from the initial linear equations to the non-linear ones.The questions are more complex,and it can not be solved by the former analytic method. In the present study,on the foundation of the Newton Method,we get a new method that the non-linear equations with the kinetic item can be solved.The example calculation shows that this method convergents fast and the results are accord with the experiment results.Thus,the method perfects the calculation of the principle of least cardiac work,and it makes a theoretical foundation to research the cardiac dynamic process.