Resistance Exercise With Blood Flow Restriction in Heart Failure

Trial details

Who runs it

Centre Hospitalier Universitaire de Nīmes

Trial code

NCT07118410

Record updated

21 October 2026

Original description

Exercise is essential in cardiac rehabilitation for heart failure patients.Aerobic training and resistance training are both recommended. Resistance training improves muscle mass and strength and also improves the remodeling of cardiac function, thus reducing exercise intolerance in these patients. However, to obtain these adaptations, resistance training must be done at moderate to high intensities, which cannot always be sustained by the most fragile and deconditioned patients, such as those with reduced ejection fraction (Heart failure with reduced Ejection Fraction).Read full original descriptionShow less

Effect of Resistance Exercise With Blood Flow Restriction by Vascular Occlusion on Myocardial Function in Heart Failure With Reduced Ejection Fraction

Exercise is essential in cardiac rehabilitation for heart failure patients.Aerobic training and resistance training are both recommended. Resistance training improves muscle mass and strength and also improves the remodeling of cardiac function, thus reducing exercise intolerance in these patients. However, to obtain these adaptations, resistance training must be done at moderate to high intensities, which cannot always be sustained by the most fragile and deconditioned patients, such as those with reduced ejection fraction (Heart failure with reduced Ejection Fraction).

Blood flow restriction (BFR) by vascular occlusion training is an interesting alternative to conventional resistance training for these deconditioned patients. Preclinical and clinical studies have shown that, for low-intensity regimens, resistance training and blood flow restriction by vascular occlusion improves muscle strength and left ventricular function, unlike resistance training alone. Tissue hypoxemia, initiated by vascular occlusion and exacerbated by maintenance of exercise, is a key element in the peripheral adaptations documented in blood flow restriction, triggering a cascade of signaling pathways involving neurohumoral factors in particular, with effects both locally (i.e. striated skeletal muscle) and remotely, on the myocardium among others. The feasibility and safety of blood flow restriction in heart failure patients has been well demonstrated. Left ventricle ejection fraction remains a very global functional index, with poor reproducibility influenced by cardiac load conditions, making it impossible to draw any conclusions as to possible improvements in myocardial function, linked to changes in intrinsic tissue decontractility/relaxation properties. New cardiac imaging techniques like Speckle Tracking Echography have made it possible to assess the effects of blood flow resistance on myocardial function but so far no studies have used these tools to compare the effects of BFR+resistance training and resistance training alone on myocardial function in heart failure patients. It is suggested that resistance training combined with blood flow resistance could further improve cardiac and muscular function compared with resistance training alone, by activating neurohumoral mediators, like certain micro ribonucleic acids.

Inclusion: LVEF ≤ 50%; Patients with an indication for cardiovascular rehabilitation in the first stay or not (according to national recommendations, as soon as possible after an exacerbation or at any time in a patient with chronic heart failure) (Bigot et al., 2024); No medical contraindication to physical activity; Patient has given free and informed consent and signed the consent form; Patient affiliated with or benefiting from a health insurance scheme.

Exclusion: Patient in an exclusion period determined by a previous study; Medication known to alter the effects of ischemic conditioning (cyclosporine, glibenclamide); Moderate to severe peripheral arterial disease. Arterial Doppler scan for arterial stenosis, with measurement of femoral and distal flows; Active or recent deep vein thrombosis. Check with venous Doppler ultrasound, looking for venous compressibility at the roots of the thighs, and 4-point venous ultrasound; Uncontrolled arterial hypertension; Severe valvular disease; Patient participating in another Category I interventional study, or having participated in another interventional study in the last month; Patient under court protection, guardianship or curatorship; Unable to provide informed consent, or patient refuses to sign consent form; Pregnant, parturient or breast-feeding patient.

ClinicalTrials.gov NCT07118410