Purpose -To determine risk factors related to acute myocardial infarction (AMI) in Brazil.Methods -Five hundred ninety one patients were selected in 20 medical centers in Brazil, Results -The factors related to acute myocardial infarction were respectively to cases and controls: (p=0.000);; family history -related to the patient's father in 42.14% and 33.22% (p=0.025) and to the mother in 42. 14% and 30.82% (p=0.007); socioeconomic level -88.99% and 60.20% owned house (p=0.002); 44.45% and 33.21% owned car (p=0.010) 42,14% e 30,82% (p= 0,007); situação socioeconômica: 88,99% e 60,20% proprietários de casa pró-pria (p= 0,002) e 44,45% e 33,21% de automóvel (p= 0,010)