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A case of pediatric cardiomyopathy with severely restrictive physiology
T Nishikawa1, Y Tanaka, Y Sasaki
1Department of Pathology, Tokyo Women's Medical College, Japan.
Insights
This study reports a rare case of familial cardiomyopathy in a child, presenting with severe restrictive physiology and congestive heart failure. Advanced myopathic changes were identified, potentially explaining the restrictive symptoms and leading to sudden death.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Genetics
Background:
- Idiopathic familial cardiomyopathy is a rare condition affecting young individuals.
- Restrictive cardiomyopathy presents with impaired ventricular filling and can lead to heart failure.
- Genetic factors play a significant role in the development of familial cardiomyopathies.
Observation:
- A 6-year-old male presented with severe congestive heart failure and restrictive physiology.
- Cardiac imaging revealed atrial dilatation and normal ventricular cavities with a characteristic square-root sign on pressure tracings.
- A family history of hypertrophic cardiomyopathy in an elder sibling suggested a genetic link.
Findings:
- Endomyocardial biopsy showed significant myocyte hypertrophy, disorganization of muscle bundles, and interstitial fibrosis.
- Autopsy confirmed diffuse ventricular hypertrophy, septal thickening, and extensive myocardial disorganization.
- These pathological findings correlate with the observed restrictive physiology.
Implications:
- This case highlights a rare presentation of familial cardiomyopathy with severe restrictive physiology in a pediatric patient.
- The findings underscore the importance of genetic evaluation in pediatric cardiomyopathies with atypical presentations.
- Understanding the myopathic changes is crucial for diagnosing and managing such rare cardiac conditions.
Abstract:
A rare case of a 6-year-old male with idiopathic familial cardiomyopathy manifesting severely restrictive physiology is reported. The patient showed congestive heart failure with dilatation of both atria with a normal ventricular cavity. A square-root configuration was revealed in the ventricular pressure tracings. His elder brother had died of hypertrophic cardiomyopathy at the age of 3 years. Endomyocardial biopsy disclosed marked disorganization of muscle bundles with hypertrophy of the myocytes and interstitial fibrosis. The patient died suddenly during hospitalization. Autopsy revealed diffuse hypertrophy of both the ventricular walls and the ventricular septum with extensive myocardial disorganization and interstitial fibrosis. These advanced myopathic changes in the myocardium may have been related to the restrictive physiology in this case.