SCOTT, R.; CHIN, A. ECG Quiz Question 49. SA Heart Journal, [S. l.], v. 15, n. 1, p. 46, 2018. DOI: 10.24170/15-1-2905. Disponível em: https://www.journals.ac.za/SAHJ/article/view/2905. Acesso em: 8 oct. 2025.