Relief of valvular stenosis can be accomplished easily and safely with percutaneous balloon valvuloplasty (Am J Cardiol 1990; 65: 775) and a delay in intervention offers no advantage.
Balloon valvuloplasty, the procedure of choice, is usually successful, provided the valve is mobile and pliant; its long-term results are excellent.
The secondary hypertrophic subpulmonary stenosis that may occur with valvular stenosis usually regresses after successful intervention.
In a series of 100 patients, balloon dilatation resulted in a significant reduction in the transvalvular gradient. which was maintained at 12 months' follow-up (lnt J Cardio11988; 21: 33542).