CLINICAL STATUS OF PATIENTS WITH UNSTABLE ANGINA AND CHRONIC HEART FAILURE WITH RETAINED EFFICIENCY FRACTION. International Bulletin of Medical Sciences and Clinical Research, [S. l.], v. 3, n. 6, p. 20–24, 2023. Disponível em: https://researchcitations.com/index.php/ibmscr/article/view/1787. Acesso em: 13 jun. 2025.