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Natural history of chronic Chagas' heart disease: prognosis factors
1Heart Institute, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo, Brazil.
Insights
Chronic Chagas' disease can progress in various ways, often leading to cardiac issues like arrhythmias and heart failure. These complications, along with thromboembolism and sudden death, indicate a poor prognosis for affected patients.
Area of Science:
- Cardiology
- Infectious Diseases
- Parasitology
Background:
- Chronic Chagas' disease presents with diverse clinical manifestations, sometimes isolated.
- Cardiac involvement is common, affecting approximately 50% of patients with arrhythmias.
- Progression can lead to heart failure, thromboembolism, and sudden death.
Purpose of the Study:
- To describe the varied progression modes of chronic Chagas' disease.
- To highlight the cardiac manifestations and their prognostic implications.
- To detail the occurrence of thromboembolic events and sudden death.
Main Methods:
- Review of clinical progression patterns in chronic Chagas' disease.
- Analysis of cardiac complication frequencies and types.
- Evaluation of prognostic factors including arrhythmias, conduction disturbances, and heart failure.
Main Results:
- Cardiac arrhythmias are frequent (around 50%), followed by heart failure.
- Thromboembolism, particularly pulmonary embolism, occurs in advanced stages.
- Sudden death is a significant outcome, predominantly in males during their productive years.
Conclusions:
- The presence of severe ventricular arrhythmias, conduction disturbances, and heart failure signifies an unfavorable prognosis in chronic Chagas' disease.
- Understanding these progression modes is crucial for patient management and risk stratification.
- Early identification of cardiac involvement may improve outcomes for Chagas' disease patients.
Abstract:
Chronic Chagas' disease shows several progression modes. Usually, the different clinical syndromes manifest themselves together, however, isolated forms can occur. Cardiac arrhythmias, which are very frequent, are present in about 50% of patients. The cardiac damage manifests itself later, with the emergence of heart failure. Thromboembolism can occur in both pulmonary and systemic circulation. Pulmonary embolism is the most frequent, appearing in more advanced phases of heart disease. Sudden death is the fatal outcome of these patients. It predominates in males and generally occurs in a disease stage when patients have their highest productivity. The presence of serious ventricular arrhythmias, conduction disturbances in the electrocardiogram, and heart failure, provide an unfavorable prognosis.