HEART RATE VARIABILITY IN PATIENTS WITH CHRONIC HEART FAILURE AND METABOLIC SYNDROME. Modern American Journal of Medical and Health Sciences, [S. l.], v. 2, n. 1, p. 293–303, 2026. Disponível em: https://usajournals.org/index.php/1/article/view/1914. Acesso em: 10 jun. 2026.