[Early and late results after surgical treatment for pulmonic stenosis with intact ventricular septum (author's transl)].

From 1958 to 1975, 309 pts. were operated on for pulmonic stenosis (PSt) with intact ventricular septum. The lesion was of the isolated valvular type in 81,5%, of the infundibular type in 9,1%, and of the combined type in 9,4%. A closed transventricular valvulotomy (Brock) was performed in 33 cases, primarily in infants. 130 pts. underwent transarterial valvulotomy in inflow occlusion, and 146 pts. were operated with the aid of extracorporeal circulation. Hospital mortality was 3,9%. All three operating methods showed almost identical early results, whereas the long-term results indicated a superiority of the open techniques. The results were less satisfying in pts. more than 20 yrs. of age than in younger ones. In 10 cases (3,4%) follow-up revealed recurrent PSt requiring re-operation, mainly because of persisting infundibular hypertrophy and markedly thickened (dysplastic) valve cusps.--Indications for the different surgical techniques are discussed on the base of the results.