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.