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[Histologic correlation of ischemic and chagasic ventricular aneurysms. Relation to physiopathology]
1Departamento de Medicina, Hospital de Clínicas José de San Martín, Facultad de Medicina, Universidad de Buenos Aires, Argentina.
Insights
Histologic findings differentiate ventricular aneurysms in Chagas heart disease and myocardial infarction. Chagas disease shows inflammatory cells and myocytolysis, while ischemic origin presents intense, early scar fibrosis.
Area of Science:
- Cardiovascular Pathology
- Histopathology
- Immunopathology
Context:
- Ventricular aneurysms are serious complications of heart disease.
- Chagas heart disease and ischemic cardiopathy are leading causes of ventricular aneurysms.
- Differentiating the etiology of ventricular aneurysms is crucial for patient management.
Purpose:
- To describe and compare the distinct histologic findings in ventricular aneurysms.
- To identify key features that differentiate Chagas disease from ischemic cardiopathy in aneurysms.
- To enhance diagnostic accuracy through detailed histopathological analysis.
Summary:
- This study examines 8 cases of ventricular aneurysms, 5 from Chagas heart disease and 3 from myocardial infarction.
- Histologic analysis reveals differences in inflammatory cell infiltration, myocytolysis, and scar fibrosis patterns.
- Chagas disease is associated with inflammatory cells (monocytes, eosinophils, lymphocytes) and myocytolysis.
- Ischemic cardiopathy shows intense and early scar fibrosis due to rapid collagen I and III stimulation.
Impact:
- Provides crucial histological markers for distinguishing between Chagasic and ischemic ventricular aneurysms.
- Aids in accurate diagnosis and understanding the pathogenesis of ventricular aneurysms.
- Contributes to improved clinical management and prognostication of patients with ventricular aneurysms.
Abstract:
We depict the histologic findings of ventricular aneurysms in 8 patients, 5 with Chagas heart disease and 3 secondary to myocardial infarction. Chagas disease and ischemic cardiopathy are the 2 conditions which show the highest incidence of ventricular aneurysms. The first one averages more than 60% in large series. The second one reveals ventricular aneurysms as a complication of myocardial infarction in 20-25% in large series. Both entities share identical hallmarks, and the same frequency of complications related to the presence of the aneurysms: vgr. sudden death, presence of malignant ventricular arrhythmias, thromboembolism, etc. Several histologic findings help to differentiate both conditions. Inflammatory cells, monocytes, eosinophils and lymphocytes interspersed within myocardial fibers, plus diverse lesions of myocytolysis point to a diagnosis of Chagas disease. We consider scar fibrosis as another capital difference to be observed in aneurysms of chagasic or ischemic origin. Fibrosis of ischemic origin is intense and early depending upon a quick stimulation of collagen I and III during the first days of myocardial infarction. Conversely, in Chagas disease the injury to the myofibrils by immunocomplexes is very slow and consequently collagen response will be slower and with lesser fibrotic response. We have previously considered in other publications this phenomenon after a geometrical-dynamical model have been designed for this purpose.