Electrocardiograph parameters of C57BL/6 mice infected with the Colombian T. cruzi strain.

1ECG parameters were evaluated using the following standard criteria: (i) heart rate (monitored by beats per minute (bpm), and (ii) the variation of the P wave and PR, QRS and corrected QT intervals (QTc), all measured in milliseconds (ms). ART, arrhythmia; AVB1, first-degree atrioventricular block; AVB2, second-degree atrioventricular block.2This data represent three independent experiments, with 7–8 infected mice/group. Three sex- and age-matched noninfected controls were analyzed in all experimental time points. The results were pooled in one representative group of 12 noninfected controls per experiment.3Significant differences*, p**, p***, pT. cruzi-infected groups of mice.