[Long term results (5 years) of the first 50 consecutive operations following Mustard's technique for simple transposition of the great vessels].

The long-term results of Mustard's operation for simple transposition of the great vessels have been studied in a homogenous series of the first 50 consecutive cases operated on by G. Lemoine. The overall mortality was 20% over the 5 year follow-up period. Serious arrhythmias or conduction defects can usually be picked up immediately postoperatively; on the other hand, stenosis of the venae cavae or of the pulmonary venous channels may come on very late and unexpectedly as growth takes place. Reoperation must be carried out to remove these stenoses when they are troublesome.