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Abstract Aims Patients with heart failure (HF) admitted for decompensation often require high doses of intravenous diuretics. This study aims to analyse whether the use of peripheral ultrafiltration (UF) in patients hospitalized for acute HF with systemic‐predominant congestion results in better hydric control, renal protection, and reduction of hospital stay compared with conventional treatment. Methods and results This study was a retrospective, comparative, single‐centre study of 56 patients admitted for HF with systemic congestion with a poor diuretic response after diuretic escalation. One group underwent peripheral UF (35 patients) and others were maintained on intense diuretic treatment (control group, 21 patients). The diuretic response and days of hospital stay were compared between and within groups. The baseline characteristics of both groups were similar: males with right ventricular failure and renal dysfunction. The inter‐group analysis showed that patients who received UF had better glomerular filtration rate (GFR; UF: 39.2 ± 18.2 vs. control: 28.7 ± 13.4 mL/min; P = 0.031) and higher diuresis (UF: 2184 ± 735 vs. control: 1335 ± 297 mL; P = 0.0001) at hospital discharge despite less need for diuretic drugs. Days of hospital stay were shorter in the UF group (UF: 11.7 ± 10.1 vs. control: 19.1 ± 14.4 days; P = 0.027). Intra‐group analysis showed that patients receiving UF improved GFR, increased diuresis, and reduced weight at discharge (P