Conclusion Bileaflet valve has a better hemodynamic influence than tilting disk valve in on patients with replacement of mitral valve.

In 37 patients with atrial fibrillation after replacement of mitral valve (mechanical), electrical conversion was used with energy of 100-200 watt-sec.

Conclusion the mitral valve replacement of reserving mitral valve structure is superior to the mitral valve replacement of excising mitral valve structure.