The role of beta blocker in the post operative low output state following adequate valvotomy in cases of pure valvar pulmonary stenosis (clinical experience).

The role of infundibular resection in cases of pure valvar pulmonary stenosis is much debated. Some advocate aggressive approach especially in cases of supra systemic right ventricular pressures. Some consider it unnecessary, and feel that it is secondary hypertrophy which will regress in due course following a successful valvotomy. But all agree that the dynamic right ventricular outflow obstruction plays a very crucial role in the immediate post operative period which can cause significant morbidity and mortality. We advocate the use of beta blocker to relieve the infundibular spasm in the immediate post operative period, thereby relieving the dynamic outflow obstruction. We herewith present two cases to exemplify this.