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Electrical Heterogeneity in Hispanic Background Subpopulations: The HCHS/SOL

Larisa G Tereshchenko1,2,3, Kazi T Haq4, Stacey J Howell5

  • 1Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.

JACC. Advances
|January 16, 2025
PubMed

Insights

Global Electrical Heterogeneity (GEH) varies among Hispanic/Latino subgroups, indicating unmeasured disparities. Cardiovascular risk factors do not fully explain these GEH differences in individuals without cardiovascular disease.

Area of Science:

  • Cardiology
  • Public Health
  • Genetics

Background:

  • The Hispanic/Latino population exhibits variability in cardiac arrhythmia prevalence and outcomes.
  • The underlying reasons for these disparities remain unclear.
  • Vectorcardiographic Global Electrical Heterogeneity (GEH) is linked to adverse cardiovascular outcomes.

Purpose of the Study:

  • To compare GEH across diverse Hispanic/Latino subpopulations.
  • To investigate if ethnicity moderates the association between cardiovascular disease (CVD) and GEH.

Main Methods:

  • Cross-sectional analysis of 15,684 participants from the Hispanic Community Health Study/Study of Latinos (HCHS/SOL).
  • GEH measured using spatial QRS-T angle, SVG azimuth, elevation, magnitude, and sum absolute QRST integral.
  • Linear regression models incorporated interaction terms of ethnic background by CVD, adjusted for numerous covariates.

Main Results:

  • Significant differences in GEH measures were observed across ethnic backgrounds (e.g., Dominican, Puerto Rican, South American, Mexican).
  • An association between coronary heart disease and GEH was particularly strong in the Cuban subpopulation.
  • Specific GEH parameters like spatial QRS-T angle and SVG azimuth showed distinct patterns among subgroups.

Conclusions:

  • GEH differences persist among Hispanic/Latino subpopulations even in the absence of CVD.
  • Standard cardiovascular risk factors do not fully account for observed GEH variations.
  • These findings suggest that unmeasured health disparities contribute to GEH differences across ethnic backgrounds.
Abstract

Keywords:
ECGHispanic/Latino ethnicitycardiovascular diseasehealth disparitieshealth equityvectorcardiogram

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