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[Percutaneous angioplasty of branch pulmonary artery stenosis. A cooperative study]
Insights
Balloon angioplasty effectively dilated severe pulmonary artery stenosis in children and young adults. However, significant hemodynamic improvement was limited, highlighting the need for advanced techniques like stenting.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Interventional Cardiology
Background:
- Branch pulmonary artery stenosis presents significant challenges in pediatric patients.
- Congenital and post-surgical etiologies necessitate effective treatment strategies.
Purpose of the Study:
- To evaluate the efficacy of balloon angioplasty for severe branch pulmonary artery stenosis.
- To assess outcomes in patients aged 4 months to 20 years undergoing the procedure.
Main Methods:
- Retrospective analysis of 50 balloon angioplasty procedures across 7 French centers (1984-1991).
- Inclusion criteria: stenosis diameter ≤ 8 mm, elevated right ventricular systolic pressure (RVP ≥ 50 mmHg), high RVP/aortic pressure ratio (≥ 50%), and perfusion defects.
Main Results:
- No operative complications were reported.
- Stenosis diameter increased by >40% in 46% of cases.
- Hemodynamic or scintigraphic improvement occurred in only 14% of cases with diameter increase.
Conclusions:
- Balloon angioplasty can increase stenosis diameter but offers limited functional improvement in severe cases.
- Restenosis was not observed, but indications for angioplasty versus surgery remain complex.
- Stent utilization may offer improved outcomes for these challenging lesions.
Abstract:
Fifty balloon angioplasties of branch pulmonary artery stenosis in 34 patients aged 4 months to 20 years, performed in 7 French Centres, were included in this study: they were performed from 1984 to 1991 and concerned severe stenoses which were congenital in 36 cases and secondary to surgery in 14 cases. The criteria of inclusion were: diameter of stenosis less than or equal to 8 mm, right ventricular systolic pressure (RVP) greater than or equal to 50 mmHg, RVP/aortic pressure ratio (RVP/AO) greater than or equal to 50%, and a significant perfusion defect on radionuclide angioscintigraphy. There were no operative complications. The diameter of the stenosis increased by greater than 40% in 23 cases (46%); in only 7 of these cases (14%) did the RVP and RVP/AO ratio decrease by more than 20%, the RVP being less than 50 mmHg, or did the perfusion scintigraphy improve. No cases of restenosis were observed. The reasons for failure are discussed together with the limitations of this study. The respective indications of surgery and angioplasty are not easy to determine for these complicated lesions. New techniques such as the use of stents should improve results.