Cardiorenal syndrome (CRS) involves the interplay between hemodynamic, inflammatory, and neurohumoral abnormalities to produce worsening heart and kidney function. Management of patients with CRS involves multidisciplinary care, starting with medical management and avoidance of further acute kidney injury (AKI). For medically refractory CRS and severe AKI, renal replacement therapy, including continuous renal replacement therapy (CRRT), may be necessary.