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Related Experiment Videos

Circannual changes in ventricular function assessed by echocardiography.

Y Saito1, K Tamura, D C Hillman

  • 1Yamanashi Medical College, Japan.

Chronobiologia
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Cardiac function exhibits a predictable yearly pattern. A circannual rhythm was observed in five echocardiographic variables among healthy Japanese adults, indicating seasonal variations in heart health.

Area of Science:

  • Cardiology
  • Chronobiology
  • Human Physiology

Background:

  • Cardiac function exhibits complex temporal variations.
  • Understanding seasonal influences on cardiovascular health is crucial.

Purpose of the Study:

  • To investigate the presence and characteristics of circannual rhythms in cardiac function.
  • To identify specific echocardiographic variables influenced by a yearly cycle in healthy adults.

Main Methods:

  • Longitudinal study design over a 1-year period.
  • Echocardiographic assessment of cardiac function in clinically healthy Japanese adults.
  • Statistical analysis to detect circannual patterns in measured variables.

Main Results:

Related Experiment Videos

  • Five echocardiographic variables demonstrated a statistically significant circannual rhythm.
  • These rhythms were observed to be more or less in phase across the studied variables.
  • The findings suggest predictable, seasonal variations in cardiac performance.

    • Conclusions:

    • Cardiac function displays predictable annual variations, indicative of a circannual rhythm.
    • This rhythm affects multiple echocardiographic parameters in healthy individuals.
    • Seasonal factors may play a role in maintaining cardiovascular homeostasis.