Electrical surrogate for detection of severe left ventricular systolic dysfunction

Kyndaron Reinier, Aapo L. Aro, Audrey Uy-Evanado, Carmen Rusinaru, Harpriya S. Chugh, Takahiro Shiota, Jonathan Jui, Sumeet S. Chugh

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Background: Early diagnosis and therapy improves outcomes in heart failure with severely reduced left ventricular ejection fraction (LVEF ≤35%), but some patients may remain undiagnosed. We hypothesized that a combination of electrocardiogram (ECG) markers may identify individuals with severely reduced LVEF. Methods: From a community-based study in the Northwest US (the Oregon Sudden Unexpected Death Study), we evaluated the prevalence of conventional ECG markers by LVEF. We then evaluated the association of nine additional ECG markers and LVEF. We validated the correlation of these ECG markers and LVEF in a separate, large health system in Los Angeles, California. Results: In the discovery population (n = 1,047), patients with LVEF ≤35% were twice as likely as those with LVEF >35% to have ≥1 conventional ECG abnormality. In the subset without conventional ECG abnormalities, ≥4 abnormal ECG markers from the expanded panel were found in 12% vs. 1% of patients with LVEF ≤35% and >35%, respectively. In the validation population (n = 9,742), 44% with LVEF ≤35% and 17% with LVEF >35% had ≥1 conventional ECG abnormality. In patients without conventional ECG abnormalities (n = 7,601), 40% with LVEF ≤35% and 5% with LVEF >35% had ≥4 abnormal ECG markers from the expanded panel. Each additional abnormal ECG marker from the expanded panel (range 0 to ≥4) more than doubled the odds of LVEF ≤35%. Conclusions: An expanded panel of easily obtained ECG markers correlated strongly with severely reduced LVEF in two separate populations. This electrical surrogate score could facilitate diagnosis of severely reduced LVEF, and warrants prospective evaluation.

Original languageEnglish (US)
Article numbere12591
JournalAnnals of Noninvasive Electrocardiology
Volume23
Issue number6
DOIs
StatePublished - Nov 2018

Keywords

  • cardiomyopathy
  • echocardiography
  • electrocardiography
  • heart failure
  • left ventricular ejection fraction
  • left ventricular systolic dysfunction

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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  • Cite this

    Reinier, K., Aro, A. L., Uy-Evanado, A., Rusinaru, C., Chugh, H. S., Shiota, T., Jui, J., & Chugh, S. S. (2018). Electrical surrogate for detection of severe left ventricular systolic dysfunction. Annals of Noninvasive Electrocardiology, 23(6), [e12591]. https://doi.org/10.1111/anec.12591