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1 Acta of Bioengineering and Biomechanics

1 2003

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The analysis of heart valve dysfunction and effectiveness of disc-designed prostheses

Shilko S. V., Hizhenok V. F., Kuzminsky Yu. G., Salivonchik S. P.

Acta of Bioengineering and Biomechanics

2003

Vol. 5, nr 2

53-62

The function of heart (in good condition and in poor condition) and hemodynamic characteristics of mechanical prosthetic cardiac valves influencing hemolysis and blood coagulation have been investigated. The solid-state models of disc-designed prosthetic cardiac valves have been constructed. The finite element analysis of blood velocity and pressure at direct and inverse blood flows has shown better characteristics of bi-leaflet valves. The advantage of the numerical modelling is in the possibility of thorough description of blood flow with determination of turbulence and depression zones for different sizes, curvature and ultimate opening angle of leafs. It allows minimising hydraulic resistance, thrombus formation and hemolysis-preserving high reliability of valve closing. The individual design of valve is discussed and aimed at improving a valve function by creating the blood flow twisting.