Resting and Dynamic Electrocardiography in Dogs with Experimental Chagas Cardiomyopathy

Figure 2

Resting electrocardiographic tracings obtained from dogs of the Acute Chagasic Group (speed 25 mm/s). (a) Derivation II, presenting third-degree atrioventricular block (arrows); (b) Derivation II, showing electric alternance of QRS complexes (arrows); (c) derivation II, showing decrease of R-wave amplitude, right branch block (red arrow) and ventricular extrasystole (black arrow); (d) derivation V₄, showing premature isolated and paired multifocal ventricular complexes; (e) derivation II, showing first-degree atrioventricular block (arrows); (f) derivation II, showing sinusal rhythm with sinus arrest (arrow). UNESP, Jaboticabal, SP, 2003.

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