Fig. 5. : Trypanosoma cruzi induces electrocardiographic (ECG) abnormalities during the chronic phase of infection. A: schematic representation of the P wave and QT complex segment of the ECG register of a non-infected (NI) mice; B: representative ECG register segments of sex and age-matched NI controls and T. cruzi-infected C3H/He mice at 150 days post-infection; C: data for ECG records showing the duration (ms) of the QRS interval; D: summary of the group data for the frequency of NI and T. cruzi-infected mice presenting arrhythmias (ARTs), second-degree atrioventricular block (AVB2) and total ECG alterations; **: p < 0.01, NI compared to T. cruzi-infected mice; #: p < 0.05, C57BL/6 compared to C3H/He lineage. Data obtained from three independent experiments (5 NI and 8-10 T. cruzi-infected mice per experiment).
