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[Hemodynamic response to isometric exercise in elderly subjects].

V Ziacchi, A Rossi, L Moretti

    Minerva Cardioangiologica
    |September 1, 1989
    PubMed
    Summary

    Elderly individuals showed reduced tolerance to isometric exercise, with significant increases in pulmonary pressures and blood pressure during handgrip testing. Heart rate and cardiac output remained unchanged.

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    Area of Science:

    • Cardiovascular Physiology
    • Geriatric Medicine
    • Exercise Physiology

    Context:

    • Isometric exercise, specifically handgrip, is a common stressor.
    • Right cardiac catheterization allows for direct hemodynamic monitoring.
    • Elderly individuals without diagnosed cardiovascular disease were studied.

    Purpose:

    • To evaluate the hemodynamic responses to isometric handgrip exercise in elderly patients undergoing right cardiac catheterization.
    • To assess changes in various cardiovascular parameters before and after isometric exercise.

    Summary:

    • Isometric handgrip exercise in 9 elderly patients (mean age 67.8 years) led to significant increases in mean pulmonary pressure (PPM, +28%) and end-diastolic pulmonary pressure (PPTD, +33.1%).
    • Modest significant increases were observed in diastolic blood pressure (PAD, +15.6%), mean blood pressure (PAM, +18.2%), left ventricular systolic stress index (ILS, +24%), and pulmonary arterial resistance (RPT, +25%).

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  • Weakly significant increases occurred in systolic blood pressure (PAS, +20%) and systemic arterial resistance (RST, +15.6%), while heart rate (FC), cardiac output (PC), cardiac index (IC), systolic index (IS), and stroke volume (GS) showed no significant variation.

    • Impact:

    • The findings suggest a reduced tolerance to isometric exercise in this elderly cohort.
    • This study highlights potential cardiovascular strain during isometric exertion in older adults, even without overt disease.
    • Results provide insights into age-related hemodynamic adaptations and limitations during physical stress.