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[Aging of heart function in man].

C Swine1

  • 1Service de Gériatrie, Cliniques Universitaires UCL de Mont-Godinne, Yvoir, Belgique.

Presse Medicale (Paris, France : 1983)
|July 22, 1992
PubMed
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Aging preserves cardiac function through adaptive mechanisms. Despite arterial stiffening and reduced heart rate, the heart maintains output at rest and during exercise via left ventricular hypertrophy and atrial compensation.

Area of Science:

  • Cardiovascular Physiology
  • Gerontology
  • Cardiac Aging

Context:

  • Normal aging involves significant changes in cardiovascular structure and function.
  • Arterial elasticity decreases, leading to increased impedance and ventricular afterload.
  • Left ventricular diastolic function is altered due to delayed relaxation and changes in muscle properties.

Purpose:

  • To investigate the impact of aging on cardiac function at rest and during exercise.
  • To identify age-related primary changes and secondary homeostatic adaptations in the cardiovascular system.
  • To understand how the aging heart maintains cardiac output despite physiological alterations.

Summary:

  • At rest, cardiac output is maintained by left ventricular hypertrophy and increased atrial contribution to filling, despite reduced arterial elasticity.

Related Experiment Videos

  • During dynamic exercise, heart rate declines but ejection volume increases, preserving cardiac output, supported by Starling's mechanism.
  • Isometric exercise elicits compensatory atrial augmentation of filling when ejection fraction decreases and end-systolic volume increases.
  • Impact:

    • The aging heart demonstrates remarkable resilience, maintaining cardiac work through compensatory mechanisms.
    • Understanding these adaptations is crucial for managing cardiovascular health in the elderly population.
    • Identifies key physiological changes and adaptive responses that preserve cardiac function throughout the lifespan.