Abstract
From Dec. '60 to Dec. '71, 57 cases of mitral valve disease were operated upon at the Surgical Department of Showa University Hospital. The preoperative and postoperative clinical studies were conducted in these cases.
Preoperatively, 36 cases were pure M. S., 17 cases were M. S. I., and 4 cases were pure M. I. Operatively, 21 cases were operated upon T. A. D. C., 27 cases upon T. V. D. C. 1 case had open reconstruction with autograft of pericardium patch to anterior leaflet (in which a traumatic hole as large as 1.0 × 1.5 cm. was noted), and direct sutured for the posterior leaflet (in which a traumatic hole 2 mm. in diameter was observed) and ruptured papillary muscle. 3 cases were given direct repair for M. S. and L. A. thrombosis. The M. V. R. was performed on 5 cases. The total mortality rate was 15.78 % (9 cases among 57 cases) . 1 case was T. V. D. C, case, 2 cases were T. A. D. C. cases, 3 cases were direct repair cases, and 3 cases were M. V. R. cases. There were four cases of intraoperatively traumatic M. I. production (3 resulted from T. V. D. C. and 1 resulted from T. A. D. C.) . Postopera-tively, 39 cases were in I degree according to the functional classification, and 9 cases were in II degree.
The indication for operation are second and third decades in age, and NYHY II-III degree in functional capacity.
The extent of commissurotomy is 3.0 cm. to 3.5 cm. Starr-Edwards 3 M mitral disc valve is more ideal as a mitral prosthesis than 2 M mitral disc valve.
2 M. S. cases had pregnancy and normal smooth delivery following closed commissurotomy.
