Treatment requirements depend on severity; mild to moderate isolated disease usually requires no intervention.
Natural history and intervention
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Mild to moderate isolated pulmonary stenosis is relatively common and does not usually progress or require treatment.
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Severe pulmonary stenosis is described as a resting gradient greater than 50 mmHg with normal cardiac output.
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Severe disease can be treated by percutaneous pulmonary balloon valvuloplasty. Surgical valvotomy is an alternative if balloon valvuloplasty is unavailable.
Outcomes
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Long-term results are very good.
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Postoperative pulmonary regurgitation is common but benign unless it is haemodynamically significant.