[Theoretical analysis of possible construction of biomechanical parameters of energy expenditures in heart muscle].
Proceeding from the data that overall efficiency of the heart muscle under constant level of contraction is estimated by the rate of fibre shortening a total expression for energy losses in the wall of the heart left ventricle is proposed. It is a concrete mathematical expression of modern concepts about the factors responsible for energy consumption by the heart. With certain assumptions the known parameters of energy expenditures are obtained: the index of heart tension (IHT known as "double product" index) and the index of time - tension TTI. More exact fulfillment of IHT is explained by the fact that it assumes certain changes of the heart contraction, while TTI is valid only at its constants level.
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004734:Energy Metabolism; D006352:Heart Ventricles / Q000378:metabolism; D008433:Mathematics; D008954:Models, Biological; D009200:Myocardial Contraction; D009206:Myocardium / Q000378:metabolism*
Teoreticheskiĭ analiz vozmozhnosti postoieniia biomekhanicheskikh pokazateleĭ énergozatrat serdechnoĭ myshtsy.