The definition of cardiac cachexia is weight loss of 6% or more in at least 6 months. The incidence in CHF patients with NYHA class III/IV is approximately 10% per year. Chronic heart failure patients with cardiac cachexia have a mortality two to three times higher than noncachectic patients. The prevalence of cardiac cachexia may be underestimated by simple measurements of body weight and body mass index because many patients show relative reductions in muscle mass despite being of normal overall weight. Body composition measurement can be essential in chronic heart failure patients to estimate sarcopenia. These methods can determine the different components of the whole body weight. To estimate sarcopenia it is essential to measure fat-free mass (FFM). According to literature dual energy X-ray absorptiometry (DXA) is the gold standard procedure to determine body composition and FFM. The use of DXA is limited in chronic heart failure patients due to low availability and relatively high cost. Bioelectrical impedance analysis (BIA) is a non-invasive, relatively low cost, bedside body composition measurement method. With no radiation exposure it can be repeated multiple times.