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Background:  The efficacy of sodium-glucose cotransporter 2 (SGLT2) inhibitors in elderly patients with heart failure with preserved ejection fraction (HFpEF) remains unclear.  Methods and Results:  In a multicenter, controlled trial, the CANONICAL study, we enrolled 82 HFpEF (left ventricular ejection fraction [LVEF] ≥50%) patients with type 2 diabetes (T2D) aged ≥65 years, with plasma B-type natriuretic peptide (BNP) ≥100 pg/mL or plasma N-terminal pro BNP (NT-proBNP) ≥400 pg/mL or history of HF. Patients were randomly assigned to 2 groups and were administered either the SGLT2 inhibitor canagliflozin (100 mg/day) for 24 weeks or standard therapy. The primary endpoints were changes in body weight (BW) and BNP concentrations. Mean (±SD) patient age, body mass index, and LVEF were 75.7±6.5 years, 25.0±3.6 kg/m 2 and 61.5±7.6%, respectively. At 24 weeks, BW was significantly lower in the canagliflozin than standard therapy group. The extent of BNP reductions at 4 weeks was significantly greater in the canagliflozin than standard therapy group (P&lt;0.05), but at 24 weeks there was no significant difference between the 2 groups.  Conclusions:  In this study, canagliflozin treatment reduced BW, but did not significantly reduce plasma BNP concentrations compared with standard therapy after 24 weeks treatment in T2D patients with HFpEF. Further large-scale randomized studies are needed to conclude the beneficial effects of canagliflozin in T2D patients with HFpEF.

circulation reports

Effect of the Sodium-Glucose Cotransporter 2 Inhibitor Canagliflozin for Heart Failure With Preserved Ejection Fraction in Patients With Type 2 Diabetes