Heart failure & cardiomyopathies

Design, Rationale, and Methods of the INITIATE-HFrEF Trial: ARNI and SGLT2 Inhibitors Sequencing in Heart Failure with Reduced Ejection Fraction (HFrEF)

JACC AdvPublished Randomized noninferiority trial

Study context

Population
Patients with heart failure with reduced ejection fraction (HFrEF)patients randomized
Participants
62 patients
Planned comparison
Simultaneous vs sequential initiation of angiotensin receptor-neprilysin inhibitors (ARNi) and SGLT2i in HFrEF
  • Simultaneousn = 29
  • Sequentialn = 33
Primary endpoint
composite of:
  • Hypotension
  • Hyperkalemia
  • Hypokalemia
  • Estimated glomerular filtration rate drop ≥50% from baseline
  • Emergency visit for HF
  • HF hospitalization
  • Cardiovascular death
Follow-up
≈24 weeks

No results yet. This paper sets out the design of a trial; its results are to come.

Baseline

Baseline characteristics

Mean age
68.1 ± 10.4 years
Men
65%
Inpatients
48%
"de novo" HF diagnosis
79%
Prior treatment with angiotensin-converting enzyme inhibitors/angiotensin receptor blockers
39%
Prior beta-blockers
61%
Prior mineralocorticoid receptor antagonists
27%
Mean left ventricular ejection fraction
33% ± 9%
Systolic blood pressure
125.3 ± 17.4 mm Hg
Estimated glomerular filtration rate
78.1 ± 23.8 mL/min/1.73 m²
Serum potassium
4.3 ± 0.5 mmol/L
Baseline characteristics were overall well balanced between groups

First agent in sequential group

Started on SGLT2i
27
Started on ARNi
6

Original publication

Design, Rationale, and Methods of the INITIATE-HFrEF Trial: ARNI and SGLT2 Inhibitors Sequencing in HFrEF. JACC Adv. Published 4 February 2026. doi:10.1016/j.jacadv.2026.102589

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