supply of prosthetic mitral rotatable heart valve, pyrolytic carbon leaflets & orifice ring for increased thromboresistance, 85 degree leaflet opening angle, controlled torque rotation mechanism, sizes 25 mm to 33 mm. #every sizes of the valve should be available with the supplying firm and all sizes of the valve to be provided before the date of casesprosthetic mitral rotatable heart valve, pyrolytic carbon leaflets & orifice ring for increased thromboresistance, 85 degree leaflet opening angle, controlled torque rotation mechanism, sizes 25 mm to 33 mm. #every sizes of the valve should be available with the supplying firm and all sizes of the valve to be provided before the date of cases,prosthetic mitral rotatable heart valve, pyrolytic carbon leaflets & orifice ring for incr eased thromboresistance, 85 degree leaflet opening angle, controlled torque rotation mechanism, si zes 25 mm to 33 mm. #every sizes of the valve should be available with the supplying firm and all siz es of the valve to be provided before the date of cases [ rate of supply 3 units per month , commencement time allowed -1 day ] => limited