Introduction. Renal dysfunction is one of the most common comorbidity of heart failure and may complicate its evolution. Aim. To analyze the frequency of chronic kidney disease in patients with decompensated chronic heart failure hospitalized in the Internal Medicine Clinic of the Clinical Emergency Hospital of Bucharest over a period of one year. Material and method. We retrospectively analyzed the data registered in hospital’s database between June 1st, 2014 – June 1st, 2015. Between 01.06.2014-01.06.2015, 609 patients with the diagnosis of chronic heart failure were hospitalized. Of these, 109 (17.89%) were diagnosed with chronic kidney disease (CKD) and represented our group of study. Distribution of chronic kidney disease in patients with chronic heart failure, depending on the stage of chronic kidney disease, was: no patient with stage 1, 26.61% with stage 2, 33.94% with stage 3A, 28.44% in stage 3B, 8.26% with stage 4 and 2.75% with stage 5. Distribution of NYHA class in the study group was: 20.18% NYHA class II, 40.37% NYHA class III, 39, 45% NYHA IV. 37 of the 109 patients (33.94%) with chronic heart failure and CKD had type 2 diabetes. Other important comorbidities in the group of study have been hypertension and anemia. Conclusions. Most patients with chronic heart failure admitted to our clinic were men, had heart failure NYHA class III and presented CKD class 3. A significant proportion of patients had risk factors for both BRC and heart failure: essential hypertension, diabetes and anemia.