Isolated Valvular Pulmonary Stenosis with a Domed Valve When Balloon Pulmonary Valvuloplasty Has Failed or Is Not an Option
This protocol covers the management of symptomatic isolated valvular pulmonary stenosis with a domed pulmonic valve and moderate or severe stenosis (peak transvalvular gradient ≥36 mmHg) in patients who are ineligible for balloon pulmonary valvuloplasty or in whom that first-line intervention did not achieve its expected goals.
Clinical scenario
Isolated valvular pulmonary stenosis with a domed pulmonic valve, moderate or severe stenosis (peak transvalvular gradient ≥36 mmHg), and less than moderate pulmonic valve regurgitation. This scenario excludes dysplastic pulmonary valve, hypoplastic pulmonary annulus, sub-valvular or supravalvular pulmonary stenosis, and severe pulmonary regurgitation.
Previous line: balloon pulmonary valvuloplasty — failure condition
Balloon pulmonary valvuloplasty (balloon valvotomy) is the first-line treatment for this condition. The expected result is rapid reduction in transvalvular gradient, increase in jet width, and free mobility of the pulmonary valve leaflets with reduced doming, together with improvement in right ventricular and tricuspid valve function. When these goals are not achieved — or when the patient is ineligible for balloon valvotomy — the management escalates to a surgical approach.
Surgical approach — partial overview
The next step involves surgical relief of the obstruction at the pulmonary valve level. The technique is selected based on the specific valve anatomy. The complete procedural criteria and decision algorithm are contained in the full structured protocol.
References
DOI: 10.2147/VHRM.S380240
According to the American Heart Association/American College of Cardiology (AHA/ACC) guidelines, in case of domed pulmonic valve with moderate or severe valvular stenosis and less than moderate pulmonic valve regurgitation, balloon valvotomy is recommended.
Severe stenosis: peak gradient ≥64 mmHg; Moderate stenosis: peak gradient between 36 and 64 mmHg.
Otherwise, surgical repair is recommended in case of symptomatic patients with moderate or severe valvular pulmonic stenosis who are ineligible for balloon valvotomy or who have failed it.
In these patients, surgical repair is required to excise thickened and obstructive valve leaflets and place a transannular patch.
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