1. Postgraduate Program in Tropical Medicine Universidade Federal de Pernambuco Recife Brazil
2. Department of Cardiology Hospital Agamenon Magalhães Recife Brazil
3. Escola de Ecografia de Pernambuco Recife Brazil
4. Universidade Católica de Pernambuco Recife Brazil
5. Department of Tropical Medicine Universidade Federal de Pernambuco Recife Brazil