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This summary is machine-generated.

Global electrical heterogeneity (GEH) is linked to sudden cardiac death (SCD) in adults. This study establishes vectorcardiographic (VCG) references for young athletes, revealing sex-based differences and performance correlations.

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Area of Science:

  • Cardiology
  • Sports Medicine
  • Electrophysiology

Background:

  • Global electrical heterogeneity (GEH) is a known risk factor for sudden cardiac death (SCD) in adults over 45.
  • GEH has not been previously quantified in young athletic populations.
  • Understanding GEH in athletes is crucial for differentiating physiological adaptations from pathological conditions.

Purpose of the Study:

  • To establish reference vectorcardiographic (VCG) metrics for male and female athletes.
  • To investigate the association of age, sex, and athletic performance with GEH in skiers.
  • To explore the relationship between ECG findings (LVH, RVH) and VCG parameters in athletes.

Main Methods:

  • A prospective cohort study of 140 skiers (mean age 19.2 ± 3.5 years) was conducted.
  • Resting 12-lead ECGs were analyzed using International ECG criteria.
  • Associations between demographic factors, athletic performance, and GEH VCG metrics were assessed.

Main Results:

  • Male athletes exhibited larger T vectors and wider spatial QRS-T angles compared to females.
  • Athletes with right ventricular hypertrophy (RVH) voltage showed significantly wider QRS-T angles and larger SAI QRST.
  • Better athletic performance correlated with a narrower spatial QRS-T angle, with performance decline linked to increased QRS-T angle.

Conclusions:

  • Vectorcardiography provides valuable insights into ECG findings in athletes, adding nuance beyond standard ECG interpretation.
  • Sex and athletic performance influence VCG parameters, suggesting physiological adaptations.
  • VCG metrics may help differentiate training-induced changes from potential cardiac risks in young athletes.