Long-term results after balloon pulmonary valvuloplasty

Area of Science:

• Cardiology
• Pediatric Cardiology
• Interventional Cardiology

Background:

• Congenital pulmonary valve stenosis is a significant condition requiring effective treatment.
• Percutaneous balloon pulmonary valvuloplasty (BPV) is a minimally invasive option for managing this condition.

Purpose of the Study:

• To evaluate the long-term outcomes of patients treated with BPV for congenital pulmonary valve stenosis.
• To identify risk factors associated with treatment success and recurrence.

Main Methods:

• A case series design was employed, following 46 patients treated between 1981 and 1986.
• Hemodynamic data, including peak systolic pressure gradients, were collected before and after BPV, with intermediate and long-term follow-up using cardiac catheterization and Doppler echocardiography.
• Patient age at the time of BPV was analyzed as a potential risk factor.

Main Results:

• BPV significantly reduced right ventricle to pulmonary artery pressure gradients acutely (70 to 23 mm Hg) and maintained this reduction at long-term follow-up (20 mm Hg).
• 89% of patients showed an acute gradient reduction, and 86% maintained gradients below 36 mm Hg at long-term follow-up without further procedures.
• Younger age at initial BPV (under 2 years) was identified as a significant risk factor for higher follow-up gradients.

Conclusions:

• BPV is an effective treatment providing durable relief from pulmonary valvular obstruction in the majority of patients.
• Close surveillance is recommended for patients undergoing BPV at less than two years of age due to increased risk of residual or recurrent obstruction.