Acute kidney injury (AKI) is frequently present in patients admitted for acute heart failure (AHF). Several studies have evaluated the mortality risk attributed to AKI in patients admitted for AHF [1–4]. These studies confirmed higher risk of death in admitted AHF patients with AKI, which is consistent with known poor prognosis in any patient with worsening renal function [5–7]. For the most part, the additional morbidity and mortality burden in AHF patients with AKI has been attributed to the concomitant comorbidities, and/or interventions such as coronary catheterization and other cardiac surgical procedures.
