Outcomes and Left Ventricular Ejection Fraction in Cardiac Magnetic Resonance: Challenging the “Higher Is Better”
4
Issued Date
2025-04-15
Resource Type
eISSN
20479980
Scopus ID
2-s2.0-105003696535
Pubmed ID
40178103
Journal Title
Journal of the American Heart Association
Volume
14
Issue
8
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of the American Heart Association Vol.14 No.8 (2025)
Suggested Citation
Krittayaphong R., Songsangjinda T., Jirataiporn K., Yindeengam A. Outcomes and Left Ventricular Ejection Fraction in Cardiac Magnetic Resonance: Challenging the “Higher Is Better”. Journal of the American Heart Association Vol.14 No.8 (2025). doi:10.1161/JAHA.124.039889 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/109943
Title
Outcomes and Left Ventricular Ejection Fraction in Cardiac Magnetic Resonance: Challenging the “Higher Is Better”
Author's Affiliation
Corresponding Author(s)
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Abstract
BACKGROUND: Contradictory evidence exists regarding the correlation between supranormal left ventricular ejection fraction (LVEF) and adverse outcomes. This study aimed to elucidate the prognostic value of supranormal LVEF. METHODS: This retrospective cohort study analyzed patients referred for cardiac magnetic resonance imaging to assess myocardial ischemia or viability. Subjects were stratified into eig8ht LVEF groups: <20%, 20% to 30%, 30% to 40%, 40% to 50%, 50% to 60%, 60% to 70%, 70% to 80%, and ≥80%. Primary outcomes included cardiovascular death, heart failure, myocardial infarction, and stroke. The extracellular volume fraction was measured. RESULTS: The study cohort comprised 3279 patients (mean age 68.0±12.7 years; 64.0% female). The group with 60% to 70% LVEF had the lowest risk and was used as the reference group. The median follow-up was 41.4 months (interquartile range, 33.9–49.7 months). The group with LVEF <20% exhibited the highest composite outcome risk (unadjusted hazard ratio [HR], 6.77 [95% CI, 3.81–12.03]; P<0.001; adjusted HR, 2.68 [95% CI, 1.28–5.62]; P<0.001). The groups with LVEF 70% to 80% and ≥80% showed increased risk (adjusted HR, 1.96 [95% CI, 1.23–3.08]; P=0.004; 2.16 [95% CI, 1.33–3.52]; P=0.002, respectively). A greater extracellular volume fraction was associated with an LVEF of 70% to 80% and ≥80% (adjusted odds ratios, 1.34 [95% CI, 1.03–1.74]; P=0.027; and 1.74 [95% CI, 1.30–2.34]; P<0.001, respectively). CONCLUSIONS: LVEF >70% demonstrated increased event rates compared with an LVEF of 60% to 70%. The supranormal LVEF warrants further investigation into its pathogenesis and management.