Fragmented QRS and Chagas' disease

Unfortunately, the authors have missed our 2 publications on this topic which have been tested in a larger population of CD patients with an implantable cardioverter-defibrillator (ICD) (FECHA study) [2,3]. We included 98 patients from 14 centers in Latin America, all of them with CD cardiomyopathy and an implantable cardioverter-defibrillator (ICD). The mean follow-up was 33±20 months. Mean LVEF was 39.6±11.8%. fQRS was found in 56 of the patients (59.6%). Location of the fragmentation was inferior in 57.1%, lateral 35.7% and anterior 44.6%. Rsr pattern was the more prevalent (57.1%) form of fragmentation. Predictors of appropriate therapy in the multivariate model were increased age (p=0.01), secondary prevention indication for the ICD (p=0.01) and ventricular pacing >50% of the time (p=0.004).