1. Pernambuco Cardiology Emergency Room (PROCAPE), University of Pernambuco, Recife, PE
2. Department of Internal Medicine, School of Medical Sciences, State University of Campinas, São Paulo
3. Department of Cardiology, Pontifical Catholic University of Campinas, Campinas, SP
4. UNICAP Institute of Clinical Research, Catholic University of Pernambuco, Recife, PE
5. Department of Surgery, School of Medical Sciences, State University of Campinas, São Paulo, Brazil