Dynamic characteristics of heart rate during a functional six-minute walk test in patients with Chronic heart failure Year - Volume - Issue 2025, volume 6, Issue 4 Authors Natalia S. Akimova , Larisa E. Konshina, Tatyana M. Bogdanova, Stanislav O. Torbin, Valeria A. Semenova, Maxim O. Zhuravlev Heading Cardiology Article type Original article PDF File Saratov_Med_J-2025-0401.pdf