[Evaluation of planimetric parameters in various mechanical heart valve prostheses]

Authors make an analysis of 9 currently used mechanical valves and the mounting area of the valve is defined as 100%. They compare the following parameters: 1-area of the fixed part of the prostheses, 2-area of the moving part of the valve in open position, 3-effective orifice of the valve. As 4-the parameter is the evaluation of number of central opening. Parameters of the primary orifice area are the most important. From the results of the study we got the following list number: 1 Omniscience, 2 Sorin bileaflet valve, 3 CarboMedics, 4 St. Jude Medical, 5 Medtronic, 6 Bicer, 7 Björk-Shiley Monostrut, 8 B-S sferic disc and 9 B-S convex-concave valve.