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Related Experiment Videos

Left ventricular contraction pattern changes with age in normal adults

B Wandt1, L Bojö, L Hatle

  • 1Department of Clinical Physiology, Central Hospital, Karlstad, Sweden.

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
|October 3, 1998
PubMed
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As people age, the heart

Area of Science:

  • Cardiology
  • Echocardiography
  • Geriatric Medicine

Background:

  • Left ventricular ejection fraction (LVEF) is a key measure of heart function.
  • Previous understanding suggested LVEF remains stable or increases with age.
  • The underlying mechanisms of age-related changes in LVEF were not fully understood.

Purpose of the Study:

  • To investigate the age-related changes in left ventricular myocardial mechanics.
  • To determine how longitudinal and short-axis contractions change with aging.
  • To assess the impact of these changes on LVEF calculation methods.

Main Methods:

  • Echocardiographic study of 40 healthy subjects aged 18 to 70 years.
  • Analysis of longitudinal shortening and short-axis diameter shortening.

Related Experiment Videos

  • Multiple regression analysis to correlate age with myocardial contractions and other variables.

    • Main Results:

    • Longitudinal shortening decreased by 20% (P < .001) with age.
    • Short-axis diameter shortening increased by 18% (P=.012) with age.
    • Age strongly correlated with both contraction patterns, independent of other factors.

    Conclusions:

    • Age-related LVEF changes are a net result of opposing longitudinal and short-axis contractions.
    • Standard LVEF calculation formulas may lead to overestimation in elderly or young individuals.
    • Findings have implications for accurate assessment of cardiac function across the lifespan.