Aim of this prospective, interventional, single-center, randomized study is to evaluate the efficacy and safety of intermittent hypoxic-hyperoxic training (IHHT) as a rehabilitation method in patients with cardiovascular pathology in the early period after coronavirus infection. The study will include 60 patients with cardiovascular pathology who underwent confirmed by laboratory tests COVID-19 infection 1-3 months ago with the degree of lung lesion CT3, CT4, who were admitted to the University Clinical Hospital No. 4 of I.M. Sechenov First Moscow State Medical University. The patients will be divided into 2 groups (intervention and control groups). Intervention group will inhale hypoxic gas mixtures (10-12% O2) followed by exposure to a hyperoxic gas mixture with 30-35% O2 5 times a week for 3 weeks, while control group will undergo a simulated IHHT. All the patients will undergo identical laboratory and instrumental testing before IHHT, after the last IHHT procedure, in a month after the last IHHT procedure and in 6 months. Estimated result of the study is to confirm or refute the hypothesis of the study that a three-week course of IHHT in patients with cardiovascular pathology in the early period after coronavirus infection can improve exercise tolerance, as well as the quality of life and psychoemotional status, and affect the dynamics of laboratory and instrumental parameters.
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Change in the levels of proinflammatory cytokines.
Timeframe: In 6 months after the reception of 15 IHHT sessions, 40-minutes long each (5 workouts per week) for 3 weeks.
Change of the endothelial function
Timeframe: In 6 months after the reception of 15 IHHT sessions, 40-minutes long each (5 workouts per week) for 3 weeks.
Changes in indicators of diastolic dysfunction.
Timeframe: In 6 months after the reception of 15 IHHT sessions, 40-minutes long each (5 workouts per week) for 3 weeks.