Dapagliflozin in Patients Hospitalized for Heart Failure: Primary Results of the DAPA ACT HF-TIMI 68 Randomized Clinical Trial and Meta-Analysis of Sodium-Glucose Cotransporter-2 Inhibitors in Patients Hospitalized for Heart Failure

Abstract

BACKGROUND: SGLT2 (sodium-glucose cotransporter-2) inhibitors reduce the risk of cardiovascular death or worsening heart failure (HF) in outpatients with HF. Data on initiation in patients hospitalized for HF are limited. METHODS: We conducted a randomized, double-blind, placebo-controlled trial evaluating the efficacy and safety of in-hospital initiation of dapagliflozin (10 mg daily) in patients hospitalized for HF. The primary efficacy outcome was a composite of time to cardiovascular death or worsening HF through 2 months. Key safety outcomes included symptomatic hypotension and worsening kidney function. A prespecified meta-analysis of randomized trials evaluating initiation of SGLT2 inhibitors in patients hospitalized for HF was performed. RESULTS: Of 2401 patients (median age, 69 [Q1–Q3, 58–77] years, 815 [33.9%] women, 448 [18.7%] Black race, 1717 [71.5%] left ventricular ejection fraction ≤40%, 1074 [44.7%] newly diagnosed HF) randomized between September 2020 and March 2025, 1218 were assigned to dapagliflozin and 1183 to placebo. The primary outcome occurred in 133 patients (10.9%) in the dapagliflozin group and 150 (12.7%) in the placebo group (hazard ratio [HR], 0.86 [95% CI, 0.68–1.08]; P =0.20). A worsening HF event occurred in 115 (9.4%) and 122 (10.3%) patients in the dapagliflozin and placebo groups, respectively (HR, 0.91 [95% CI, 0.71–1.18]). Cardiovascular death occurred in 30 (2.5%) and 37 (3.1%) patients (HR, 0.78 [95% CI, 0.48–1.27]), and death from any cause occurred in 36 (3.0%) and 53 (4.5%) patients in the dapagliflozin and placebo groups, respectively (HR, 0.66 [95% CI, 0.43–1.00]). The rates of symptomatic hypotension were 3.6% and 2.2%, and the rates of worsening kidney function were 5.9% and 4.7% with dapagliflozin and placebo, respectively. In a meta-analysis of patients hospitalized for HF, SGLT2 inhibitors reduced the early risk of cardiovascular death or worsening HF (HR, 0.71 [95% CI, 0.54–0.93] P =0.012) and of all-cause death (HR, 0.57 [95% CI, 0.41–0.80]; P =0.001). CONCLUSIONS: In this trial, in-hospital initiation of dapagliflozin did not significantly reduce the risk of cardiovascular death or worsening HF through 2 months in hospitalized HF patients. However, the totality of randomized clinical trial data suggests that in-hospital initiation of SGLT2 inhibitors may reduce the early risk of cardiovascular death or worsening HF and of all-cause mortality. REGISTRATION: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT04363697.