To analyze whether electrocardiographic alterations (ECGA) in patients with antibodies to Trypanosoma cruzi showed a patttern of familial aggregation. a sample of 379 young adults (166 men and 213 women) distributed in sibships. were assessed for the presence of anti-T. cruzi antibodies. https://www.maximilianopellegrini.com/product-category/dybderens/