Valvular prosthesis

By using a high speed camera it is possible to obtain some films which show the valvular movements in detail. Some frames from a high speed film of the closing phase of the HK prosthesis, 27 mm TAD, are shown in Fig. 3. In this way it is possible to measure the real area of the open valve and to compare it with the nominal area. High speed films are very important for the bioprostheses because their mechanics are not knoxm, a priori. This is the only way to examine the movements of the leaflets during the cardiac cycle. 

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