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CC: Chagas cardiomyopathy; Non-CC-BD: blood donors with positive T. cruzi serology and without cardiomyopathy, presenting normal electrocardiogram (ECG) and left ventricular ejection fraction (LVEF); CC-Non-Dys-BD: blood donors with positive T. cruzi serology and presenting ECG abnormalities and normal LVEF at rest; CC-Dys: patients with positive T. cruzi serology and CC, with left ventricular dysfunction.
