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Postprandial hemodynamic changes evaluated by a Doppler echocardiographic method

M Ishimine1, T Takamoto, M Nitta

  • 1Second Department of Internal Medicine, Faculty of Medicine, University of Ryukyus, Okinawa, Japan.

Japanese Heart Journal
|January 1, 1994
PubMed
Summary
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Eating a meal significantly increases stroke volume and cardiac output in healthy men, impacting left ventricular function. Standardizing mealtimes is crucial for accurate Doppler studies of heart function.

Area of Science:

  • Cardiology
  • Physiology
  • Medical Imaging

Background:

  • Postprandial hemodynamic changes are not fully understood.
  • Accurate assessment of left ventricular function is vital for cardiovascular health.
  • Doppler echocardiography is a key tool for evaluating cardiac performance.

Purpose of the Study:

  • To investigate the effects of food ingestion on postprandial hemodynamic parameters.
  • To assess changes in stroke volume and left ventricular dimensions after a meal.
  • To determine the impact of meal timing on Doppler-derived cardiac function measurements.

Main Methods:

  • Doppler and M-mode echocardiography were used to measure stroke volume, left ventricular end-diastolic dimension, and ejection fraction.
  • Measurements were taken in 10 healthy young men before and at several time points after lunch.

Related Experiment Videos

  • A separate group of 9 healthy older adults underwent an oral glucose tolerance test.

    • Main Results:

    • Stroke volume increased by approximately 18% one hour after lunch and remained elevated for 4 hours.
    • Left ventricular end-diastolic dimension and ejection fraction also increased postprandially.
    • Oral glucose tolerance test did not alter stroke volume, suggesting a food-specific effect.

    Conclusions:

    • Food ingestion induces a positive inotropic effect and expands circulating blood volume, increasing heart rate.
    • Postprandial hemodynamic shifts can significantly influence cardiac function measurements.
    • Standardizing mealtimes is essential for the validity of serial Doppler studies evaluating left ventricular function.