Cardiac Manifestations of Trypanosoma cruzi Infection in a Domestic Dog.

• Trypanosomiasis manifests as myocardial dysfunction with arrhythmias in dogs. • Arrhythmias in this dog prompted further evaluation with echocardiography. • Echocardiography confirms cardiac enlargement and dysfunction in Chagas myocarditis. • Bundle branch block and ventricular aneurysms are features of Chagas disease. • These features are more frequently described in humans than in dogs.