Heart failure (HF), a chronic heterogeneous syndrome with increasing prevalence and incidence, is associated with high mortality and morbidity [1,2]. In ambulatory patients, the occurrence of an episode of acutely decompensated HF (ADHF) implies adverse prognosis and represents a challenge for health systems [3,4]. The relationship of renal function (RF) with HF is well established, the acute or chronic dysfunction of one of the organs aggravating the dysfunction of the other [5–7]. The worsening of RF in patients with HF is associated with an increased risk of death and hospitalization [8,9].
