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Related Experiment Videos

Plasma atriopeptin during exercise in dogs under beta-blockade.

F Péronnet1, S A Adjoa, L Béliveau

  • 1Département d'Education Physique, Université de Montréal, Québec, Canada.

The American Journal of Physiology
|May 1, 1989
PubMed
Summary

Plasma atriopeptin levels increase with exercise, especially when beta-adrenergic blockade is present. This suggests atrial stretch controls atriopeptin release during physical activity.

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Area of Science:

  • Cardiovascular Physiology
  • Endocrinology

Background:

  • Atriopeptin, also known as atrial natriuretic peptide (ANP), is a hormone released from the heart.
  • Exercise stimulates various physiological responses, including hormonal changes.
  • Beta-adrenergic blockade alters cardiovascular function and hormonal regulation.

Purpose of the Study:

  • To investigate plasma atriopeptin concentrations at rest and during exercise.
  • To determine the effect of beta-adrenergic blockade on atriopeptin levels during exercise.
  • To explore the relationship between atrial stretch and atriopeptin release.

Main Methods:

  • 10 mongrel dogs were studied at rest and during moderate treadmill exercise.
  • Exercise was performed with and without beta-adrenergic blockade using propranolol.

Related Experiment Videos

  • Plasma atriopeptin, renin activity, aldosterone, and vasopressin concentrations were measured.

    • Main Results:

    • Exercise caused a small but significant increase in plasma atriopeptin without beta-blockade.
    • Propranolol significantly reduced heart rate at rest and during exercise.
    • Exercise with beta-blockade resulted in a markedly higher increase in plasma atriopeptin, suggesting increased atrial stretch.

    Conclusions:

    • Atriopeptin release during exercise is influenced by atrial stretch.
    • Beta-adrenergic blockade enhances the exercise-induced release of atriopeptin.
    • Elevated atriopeptin during beta-blockade may modulate renin-angiotensin-aldosterone system and vasopressin responses.