The relationship between heart rate reserve and oxygen uptake reserve in heart failure patients on optimized and non-optimized beta-blocker therapy . Clinics, [S. l.], v. 63, n. 6, p. 725–730, 2008. DOI: 10.1590/S1807-59322008000600003. Disponível em: https://www.revistas.usp.br/clinics/article/view/17720.. Acesso em: 23 may. 2024.