The ideal heart va
The ideal heart valve should
1-Be fully sterile at the time of implantation and be non toxic.
2-Be surgically convenient to insert near the normal location of the heart.
3-Conform to the heart structure (the size and shape of prosthesis should not interfere with cardiac function.)
4-Show a minimum resistance to flow to prevent a significant pressure drop across the valve.
5-Have a minimal reverse flow necessary for valve closure , so as to keep the incompetence of the valve allow level .
6-Show long resistance to mechanical and structural wear belong – lasting (25 years, ) and maintain its normal functional performance (most not deteriorate over time)
7-Cause minimal trauma to blood elements and the endothelial tissue of the cardiac vascular structure surrounding. The valve
should also allow probability for thromboembolic complications without the use of anticoagulants .
8-Be sufficiently quiet so as not to disturb the patient
9-Minimize production of turbulence
10-Not induce regions of high shear stress11-Contain no stagnation or separation regions in its flow field, especially adjacent to the valve super structure