A case of decompensated chagasic cardiopathy in a nine-year-old boy from the south of the State of Goiás, is described. He developed congestive heart failure four monthsbeforedeath. Thesorologicalreactionfor Chagas ' disease and the xenodiagnosis were positive. Electrocardiograms showed sinusal tachycardia, ventricular and supraventricular extrasystoles, left anterior hemiblock, complete right bundle branch block and signs of chambers overload. The echocardiogram demonstraded chamber dilatation with diffuse hypocontractility. He presented a downhill course complicated with several pneumonic episodes, the last one just before death. At necropsy, the heart, exhibited a chronicpancarditis with fibrosing chronic myocarditis involving mainly the interventricular septum and left ventricle. The heart conduction system showed slight to moderate exsudative, inflammatory changes. Scattered foci of slight chronic periganglionitis and rare degenerative phenomena ofganglionar cells were found in intracardiac autonomic nervous, without neuronal depopulation.
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