СYCLIC PRESSURE-FLOW RATE CHARACTERISTIC OF THE LEFT VENTRICLE OF HEART

Abstract

Purpose. Search of adequacy of parameters of supplying of the blood in warmly vascular system by means of the pump of heartassist device to parameters of a natural circulation on the basis of creation of the sure-flow rate characteristic of the left ventricle of heart according to existing in medical literature experiments.

Materials and methods. Basis for construction pressure-flow rate characteristic of the left ventricle of heart polycardiograms, which are received as a result of the most exact experiment, served. The characteristics of the polycardiogram used for construction consider fluctuations of an expense and pressure after closing of the aortal valve.

Results. The cyclic pressure-flow rate characteristic of the left ventricle of heart in coordinates pressure-flow rate. The area of the received characteristic in the accepted coordinates represents cyclic power of a left ventricle of heart, including power costs of closing of the aortal valve.

Conclusion. The received pressure-flow rate characteristic of the left ventricle of heart allows to specify a metabolic cost on commission of a cordial cycle, to specify laws of the supply and a pressure for pumps, at further static processing of the existing polycardiograms the received characteristic of heart can serve as specification of the existing diagnostic receptions which are carried out on development of parameters of an expense, pressure and also independent diagnostic parameter, can be also used when modeling the blood circulatory system.