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Tolvaptan, a vasopressin V 2 receptor antagonist, is approved in Japan for the treatment of fluid retention in patients with heart failure (HF), and in the United States for hyponatremia. The efficacy and safety of tolvaptan in patients with HF with reduced ejection fraction (HFrEF) have been demonstrated previously. However, its efficacy in patients with HF having preserved (HFpEF) and mid-range (HFmrEF) ejection fraction (EF) remains uncertain. The present subgroup analysis from the post-marketing surveillance SMILE Study aims to explore the efficacy and safety of tolvaptan across the HF subgroups (HFrEF, HFpEF, and HFmrEF).Patients with HF accompanied by fluid retention who received tolvaptan were enrolled. Primary endpoints were: change in body weight, 24-hour urine volume, congestive symptoms, and safety over 14-day treatment. Of the 3,349 patients enrolled, left ventricular EF data were available for 1,741 patients; 45.7% had HFpEF. Tolvaptan treatment resulted in body weight reduction and increases in 24-hour urine volume across the 3 subgroups. Congestive symptoms significantly improved over the 14-day treatment in all subgroups. The frequency of adverse events (AEs) was comparable across the subgroups; thirst was the most common AE.Tolvaptan provides a safe and effective option for treating fluid retention in patients with HFpEF, as well as HFmrEF and HFrEF.

international heart journal

A Prospective, Multicenter, Post-Marketing Surveillance Study to Evaluate the Safety and Effectiveness of Tolvaptan in Patients with Reduced, Preserved, and Mid-Range Ejection Fraction Heart Failure