Incidencia de fibrilación auricular en pacientes con dispositivos de estimulación cardiaca con cardiopatía chagásica y no chagásica

Abstract

The association between atrial fibrillation (AF) development in presence of Chagas heart disease in a population carrying cardiac stimulation devices has not been described. We present a retrospective cohort study conducted at the FCI that collects the main clinical features of a population with heart disease of varied etiology and carriers of cardiac stimulation devices seeking to assess the incidence of AF in patients with Chagas cardiomyopathy. To date there is not a regional or institutional database that contains variables analyzed here. During the 5 months of the construction of the database we included 99 research subjects. We implanted forty two dual chamber pacemakers, thirty nine bicameral defibrillators, six defibrillators with cardiac resynchronization function, two cardiac resynchronization devices without defibrillator function and seven unicameral defibrillators. Of the 99 subjects collected 8 presented the main outcome (AF) and of those only 1 belongs to the group of patients with Chagas cardiomyopathy. The small number of outcomes makes not possible to develop a regression model of Cox and or other types of statistical analyzes raised in the initial protocol due to the low number of cases and low statistical power. This difficulty is due to the pathology itself and the short follow-up time. Therefore it can not be set if there is a relationship between the presence of positive T. Cruzi serology and the presence of AF.