Complex Exercises of the Respiratory Muscles Plus Aerobic Training vs. Aerobic Training in Patients With СHF

Inclusion Criteria: * Male and female patients aged 18 years and older (inclusive) * Patients with stable heart failure of the II-III functional class. * Signed patient informed consent to participate in the study. * Left ventricular ejection fraction ≤40%, confirmed by the results of EchoCG no more than 3 months before the start of the study. * Patients who can understand the objectives of this study and comply with the requirements of the Protocol. Exclusion Criteria: * • Heart failure I and VI functional class * Left ventricular ejection fraction\> 41% or no confirmed data on the left ventricular EF. * Myocardial infarction, ACS, heart surgery, percutaneous coronary intervention, or coronary artery bypass surgery performed less than 3 months prior to randomization. * Unstable or refractory angina. * Pulmonary heart. * Constrictive pericarditis. * Hypertrophic cardiomyopathy. * Amyloid cardiomyopathy. * Syndrome of premature excitation of the ventricles. * The need for percutaneous coronary intervention or coronary bypass surgery in the near future. * Sinus node dysfunction syndrome. * The presence of a pacemaker. * The presence of diagnosed non-cardiac causes of CHF. * Any non-cardiac disease that reduces the expected duration to less than 2 years from the moment of randomization. * A stroke less than 1 month prior to randomization or a stroke with marked continuing neurological disorders less than 12 months before randomization * Orthoped…