Long Term Results with Tilting Disk and Bileallet Prostheses in Mitral Valve Replacement / 日本心臓血管外科学会雑誌

ABSTRACT

A total of 35 patients who underwent mitral valve replacement were followed up for more than 5 years. Their hemodynamics and valve function were analyzed using transthoracic and esophageal Doppler ultrasound echocardiography and cineangiography. They were classified and evaluated according to valve function. The tilting disk valve replacement group (group I) consisted of 24 cases, the bileaflet valve replacement group (group II) consisted of 11 cases. There were 4 mechanical valve dysfunction cases in group I. The function of group II tended to be superior to group I, even excluding those with valve dysfunction. However, the hemodynamic recovery of the latter was as good as that of group II. The left cardiac function parameters of LVEF, %FS and CI were comparable in both groups, but in valve dysfunction cases LVEDVI decreased because of prosthetic stenosis and there was some right ventricular overload with severe tricuspid regurgitation.