CHIN, A; MILLAR, RS. ECG Quiz 69. SA Heart Journal, [S. l.], v. 22, n. 3, p. 196–197, 2025. DOI: 10.24170/22-03-7668. Disponível em: https://orion.journals.ac.za/index.php/SAHJ/article/view/7668. Acesso em: 12 jun. 2026.