among 164 patients who underwent mitral valve replacement because of mitral stenosis ( with or without mitral regurgitation ) and had radiographs taken of their operatively excised mitral valves , 20 had absent or minimal calcific deposits in the excised valves and absent or minimal mitral regurgitation as determined , except for one patient , by left ventricular angiography preoperatively .
C0026268
mitral valve replacement
C0026264
mitral valves