Electrocardiograph parameters of C57BL/6 and Nos2−/− mice infected with the Colombian T. cruzi strain.

†ECG parameters were evaluated at 40 dpi, 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 QT intervals, all measured in milliseconds (ms); Brad, bradycardia; AVB1, first-degree atrioventricular block; AVB2, second-degree atrioventricular block.‡These data represent two independent experiments, with 5–7 mice/group.§, p§§, pNos2−/− noninfected groups of mice;*, p**, p***, pT. cruzi-infected groups of mice;#, p##, p###, pNos2−/−T. cruzi-infected mice.