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[Relationship between ventricular arrhythmia and cardiac function in Chagas disease]
A C Barretto1, C Mady, B M Ianni
1Instituto do Coração do Hospital das Clínicas, FMUSP, São Paulo.
Insights
Ventricular arrhythmias are common in Chagas disease, even with normal heart function. Their frequency and intensity increase as left ventricular dysfunction worsens.
Area of Science:
- Cardiology
- Infectious Diseases
- Electrophysiology
Purpose:
It is well established the association between heart failure and arrhythmias in different cardiopathies. There are no studies in Chagas' myocardiopathy that analyze the relation between arrhythmias and left ventricular function.
Methods:
We studied 629 patients with Chagas' disease, divided in 3 groups, according to ejection fraction obtained through echocardiographic study (normal, between 0.64 and 0.45, and below 0.44).
Results:
At conventional ECG, the presence of ventricular arrhythmias was respectively in the 3 groups: 15%, 36% and 64%, showing higher incidence when left ventricular function was getting worse.
Conclusion:
Ventricular arrhythmias in Chagas' disease are frequent in patients with normal ejection fraction, and become more intense as ventricular dysfunction progresses.
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