Clinical and morphological characteristics associated with sudden cardiac death in patients with Chagas' disease

Area of Science:

• Cardiology
• Infectious Diseases
• Pathology

Background:

• Chagas disease, caused by Trypanosoma cruzi, is a significant cause of heart disease in endemic areas.
• Sudden cardiac death is a major concern in Chagas disease patients, but its clinical profile is not fully understood.

Purpose of the Study:

• To determine the clinical profile and pathological findings associated with sudden cardiac death in patients with Chagas disease.
• To compare the characteristics of sudden death in asymptomatic versus symptomatic Chagas disease patients.

Main Methods:

• Retrospective analysis of medical records and autopsy findings from 24 patients who died suddenly from Chagas disease between 1982 and 1988.
• Clinical data included patient demographics, symptoms, physical examination findings, electrocardiograms (ECG), and chest X-rays.
• Autopsy data focused on heart weight and cardiac chamber morphology.

Main Results:

• The study included 24 patients (average age 51, 70% male), with 20% being asymptomatic.
• Common clinical findings included dyspnoea (66%), arrhythmias (58%), ankle swelling (54%), and abnormal ECGs (95%).
• Autopsies revealed significant cardiac pathology, including chamber dilatation (91%) and apical aneurysms (79%), with a mean heart weight of 496g.

Conclusions:

• The majority of sudden cardiac deaths in Chagas disease are associated with severe underlying myocardial disease.
• However, sudden cardiac death can occur in Chagas disease patients with minimal or no apparent heart involvement.
• Asymptomatic patients who die suddenly tend to have less severe cardiac pathology compared to symptomatic individuals.