Lachowska K, et al. - Given that slow breathing (SLOWB) has been shown to alleviate chronic heart failure (HF) symptoms, researchers assessed how hemodynamics and prognostic parameters in HF patients with reduced ejection fraction (HFrEF) are influenced by device-guided breathing. SLOWB home training (30 minutes daily) was given to 21 patients with HFrEF on optimal medical therapy. These patients were assessed for blood pressure (BP), heart rate (HR), HR variability, 6-minute walk test (6MWT), cardiopulmonary exercise testing (CPET), and echocardiography measurements before and 3 months after training. After 3 months, patients were assigned to either Group 1 and continued SLOWB, or Group 2 with no SLOWB. All tests were repeated after 6 months. Findings revealed SLOWB training resulted in improved cardiorespiratory capacity. Moreover, this intervention appeared to slow the progression of HFrEF.