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Myocarditis and myocardial interstitial fibrosis in constrictive pericarditis--an extended pathological spectrum?
K K Talwar1, J P Narula, P Chopra
1Department of Cardiology, All India Institute of Medical Sciences, New Delhi.
Insights
Constrictive pericarditis can involve myocarditis and fibrosis, even without endocardial thickening. Endomyocardial biopsy findings in restrictive heart disease require careful interpretation alongside clinical signs of constrictive pericarditis.
Area of Science:
- Cardiology
- Pathology
- Cardiac Histology
Background:
- Constrictive pericarditis is a condition affecting the heart's outer lining.
- Restrictive heart disease involves impaired heart filling.
- Distinguishing between these conditions can be challenging.
Purpose of the Study:
- To investigate the histopathological findings in patients with constrictive pericarditis.
- To determine the prevalence of myocarditis and fibrosis in constrictive pericarditis.
- To assess the specificity of endomyocardial biopsy findings in restrictive heart disease.
Main Methods:
- Endomyocardial biopsy was performed in six patients diagnosed with constrictive pericarditis.
- Histopathological examination of myocardial tissue was conducted.
- Clinical evaluations were correlated with biopsy results.
Main Results:
- All six patients showed evidence of myocarditis.
- Myocardial interstitial fibrosis was present in all patients.
- Endocardial thickening was not a consistent finding.
Conclusions:
- Myocarditis and myocardial interstitial fibrosis are common in constrictive pericarditis.
- Endomyocardial biopsy findings suggestive of fibrosis are not specific when constrictive pericarditis is clinically evident.
- Clinical assessment is crucial for accurate diagnosis in restrictive heart disease.
Abstract:
We performed endomyocardial biopsy in six patients with constrictive pericarditis, revealing the presence of myocarditis and myocardial interstitial fibrosis in all regardless of the endocardial thickening. These findings suggest that the presence of endomyocardial involvement in the setting of restrictive heart disease should not be deemed specific for endomyocardial fibrosis when the clinical evaluation suggests constrictive pericarditis.