Interpretation of electrocardiogram in an ultra-marathon athlete: a case report. Italian Journal of Medicine, [S. l.], v. 13, n. 1, p. 64–67, 2019. DOI: 10.4081/itjm.2019.1074. Disponível em: https://www.italjmed.org/ijm/article/view/itjm.2019.1074. Acesso em: 6 jul. 2025.