Heart failure type by ejection fraction (four categories, 2021 universal definition as restated in 2022) front_hf_ef_type@1.0
judgement
Open licence (CC BY)
Draft · pending review draft — pending clinical and coding review
- Status
- draft — pending clinical and coding review (draft)
- Condition
- Heart failure
- Tier
- judgement
- Licence
- Open licence (CC BY)
- To confirm
- To confirm with a clinician: the boundary wording at exactly 40%. This file reads reduced as 40% or lower (the openly licensed source); the federal cross-check says below 40%. A reported 40% is shown as reduced.
- To confirm with a clinician: the improved-category baseline rule. The baseline is the first earlier ejection fraction of 40% or lower on file and the comparison value is the latest; another reading (lowest earlier value, or the value just before the latest) can give a different answer.
- To confirm with a clinician: whether the 2021 categories should stay the shown edition now that a 2026 edition reportedly drops fixed cut-offs between reduced and preserved.
- Source checked
- opened on 2026-11-14: Opened the article page (section 1.3, New universal definition). Each threshold checked against the page: 40% or lower; 41% to 49%; 50% or higher; improved = baseline 40% or lower, a rise of at least 10 points and a second value above 40%. All four match this file's thresholds and boundary tests.
- Use here
- front condition (side panel options)
- Edition
- 2022
- Why not executable
- The 2021 categories are shown as the 2021 edition. A 2026 second universal definition reportedly drops fixed cut-offs between reduced and preserved ejection fraction while keeping the improved category (summary of an openly licensed editorial; the consensus document itself was not opened). Clinical decision needed before release. A federal cross-check (NHLBI, 2022) describes reduced ejection fraction as below 40%, not 40% or lower: the boundary at exactly 40% differs between sources.
Clinical implications of the universal definition for the prevention and treatment of heart failure
front_hf_ef_type@1.0In our words: Reduced ejection fraction: 40% or lower. Mildly reduced: 41% to 49%. Preserved: 50% or higher. Improved: an earlier ejection fraction of 40% or lower, a later one above 40%, and a rise of at least 10 points. (2021 edition, as restated in an openly licensed 2022 paper.)
HFrEF, LVEF ≤ 40%
Chandramouli C, Stewart S, Almahmeed W, Lam CSP (Clinical Cardiology) (2022) · Section 1.3 'New universal definition' (classification by left ventricular ejection fraction) · source
open licence: CC BY 4.0, attribution: Chandramouli C, Stewart S, Almahmeed W, Lam CSP. Clinical implications of the universal definition for the prevention and treatment of heart failure. Clin Cardiol 2022;45(Suppl 1):S2-S12. doi:10.1002/clc.23842. Licensed under CC BY 4.0. No endorsement by the cited bodies is implied.
- Universal definition and classification of heart failure, Bozkurt B et al. (J Card Fail / Eur J Heart Fail) (2021), classification by ejection fraction — society consensus (no open licence seen); numbers restated; text not reproduced
- Second universal definition of heart failure, Walsh MN et al. (Eur Heart J) (2026) — newer edition, not opened; reportedly drops fixed cut-offs between reduced and preserved; numbers not used
- Accelerating heart failure research, National Heart, Lung, and Blood Institute (2022), description of reduced ejection fraction · link — federal cross-check only; describes reduced ejection fraction as below 40% (boundary at exactly 40% differs)
- ICD-10-CM FY2027 tabular list and index, CDC National Center for Health Statistics (2026), I50.2-, I50.3- · link — coder reference only; no index entry for mildly reduced or improved ejection fraction
Review
Reviewed only when both a clinical review and a coding review are recorded as approved.
Clinical review: none recorded yet.
Coding review: none recorded yet.