Similar weight loss with lower diuretics dose
The study’s primary outcome was a measure of diuretic efficiency, calculated as a person’s cumulative weight change divided by the cumulative dose of loop diuretics.
Both treatment arms experienced nearly identical weight loss, but for the people who received dapagliflozin, this occurred with a lower cumulative dose of diuretics. The diuretic efficiency with dapagliflozin produced comparable weight loss with a 35% lower amount of loop diuretic dose, a difference that fell just short of significance (P = .06).
However, treatment with dapagliflozin also significantly boosted 24-hour natriuresis and 24-hour diuresis, and it significantly shortened the time to stopping treatment with IV diuretics and to hospital discharge, Dr. Cox reported. Dapagliflozin initiation and ongoing treatment was also safe and well tolerated compared with usual care.
The fact that the primary endpoint fell short of significance was “largely related” to the study’s relatively small size, Dr. Wiviott suggested. He noted that the DAPA ACT HF-TIMI 68 study, which is a much larger and potentially more definitive study of the safety and efficacy of dapagliflozin in comparison with usual care for patients with acute heart failure, is in progress. The study includes about 2,400 patients.
The primary outcome is the combined rate of cardiovascular death or worsening heart failure during the 2 months following randomization. Results are expected in 2024.
DICTATE-AHF was sponsored by AstraZeneca, the company that markets dapagliflozin (Farxiga). Dr. Cox has received research funding from AstraZeneca and has been a consultant to Roche and Translational Catalyst. Dr. Wiviott has received research funding from AstraZeneca and from Merck and has been a consultant to Icon Clinical and Novo Nordisk.
A version of this article appeared on Medscape.com.