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[Mitral commissurotomy in children. Apropos of 100 cases]
Insights
Mitral commissurotomy offers good early results for rheumatic mitral stenosis in children. However, long-term outcomes can be compromised by rheumatic disease progression and restenosis.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Rheumatic Heart Disease
Context:
- Rheumatic mitral stenosis (RMS) in children presents with severe functional impairment and significant cardiopulmonary changes, including pulmonary arterial hypertension.
- Pediatric RMS often involves complex valve lesions and associated conditions like tricuspid insufficiency.
- Early surgical intervention via mitral commissurotomy is considered for symptomatic pediatric RMS.
Purpose:
- To evaluate the early and long-term outcomes of mitral commissurotomy in pediatric patients with rheumatic mitral stenosis.
- To identify factors contributing to late clinical deterioration after mitral commissurotomy in this population.
- To discuss the management of associated conditions such as tricuspid insufficiency and pulmonary arterial hypertension.
Summary:
- A study of 100 pediatric patients (≤15 years) undergoing mitral commissurotomy for RMS showed satisfactory early clinical improvement and low mortality.
- Long-term follow-up revealed progressive deterioration in a significant proportion of patients, primarily due to rheumatic disease progression leading to restenosis or new valve lesions.
- Associated tricuspid insufficiency often resolved postoperatively, and pre-capillary pulmonary arterial hypertension demonstrated a tendency towards regression.
Impact:
- Mitral commissurotomy provides initial relief but highlights the critical need for strategies to address the ongoing rheumatic process to improve long-term outcomes in pediatric RMS.
- Understanding the natural history of RMS and its impact on valve function is crucial for managing pediatric patients.
- The study underscores the importance of long-term surveillance for restenosis and other valve complications in children treated for rheumatic mitral stenosis.
Abstract:
We report 100 cases of mitral commissurotomy in children, 15-years-old or less, suffering from rheumatic mitral stenosis. Mitral stenosis in children is characterised by the severity of functional impairment and the considerable radiological, electocardiological and haemodynamic changes, with pulmonary arterial hypertension which is always present and often well marked. The early results of mitral commissurotomy are very satisfactory with clinical improvement and a low mortality. But, in the long term, we have seen progressive deterioration in the clinical state of these patients resulting from re-stenosis or from the progression of another valve lesion. Three problems have been discussed. First, the progression of the rheumatic process which seems to account to a large extent for the late failures of mitral commissurotomy in children. Secondly, the problem of tricuspid insufficiency, which is often associated with mitral stenosis in childhood and which usually disappears during the post-operative period. Finally, the problem of pre-capillary pulmonary arterial hypertension which always showed a tendency towards regression.