Patients from both genders, older than 12 years old and with ejection fraction < 45% in transthoracic echocardiogram were included in the study, as all of them were autochthonus from Amazon region.
Se incluyeron a pacientes de ambos sexos, con edad superior a 12 años y fracción de eyección < 45% en el ecocardiograma transtorácico, y todos eran autóctonos de la Amazonía.
Foram incluídos pacientes de ambos os sexos, com idade superior a 12 anos e fração de ejeção < 45% no ecocardiograma transtorácico, sendo todos autóctones da Amazônia.