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Related Experiment Videos

Cardiovascular responses during the menopausal hot flush

J Ginsburg, J Swinhoe, B O'Reilly

    British Journal of Obstetrics and Gynaecology
    |September 1, 1981
    PubMed
    Summary

    Menopausal flushes cause immediate, significant increases in hand blood flow, with lesser effects on forearm and calf flow. These circulatory changes are linked to autonomic activity and thermoregulation disturbances during menopause.

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    Area of Science:

    • Physiology
    • Gynecology
    • Cardiovascular Research

    Background:

    • Menopausal flushes are a common symptom experienced by women during menopause.
    • The physiological mechanisms underlying menopausal flushes are not fully understood.
    • Previous research suggests a link between flushes and circulatory changes.

    Purpose of the Study:

    • To investigate the specific circulatory responses during spontaneous and stress-induced menopausal flushes.
    • To quantify changes in blood flow and pulse rate during menopausal flushing.
    • To explore the potential role of autonomic activity and thermoregulation in menopausal flushes.

    Main Methods:

    • Utilized plethysmography to measure circulatory responses.
    • Monitored hand, forearm, and calf blood flow.
    • Recorded mean pulse rate and blood pressure during flushing events.

    Main Results:

    • An immediate and marked increase in hand blood flow was observed at the onset of flushes, lasting 3-4 minutes.
    • Forearm and calf blood flow increased to a lesser extent, returning to baseline within 4.5 minutes.
    • Pulse rate increased during flushes, but returned to baseline while limb flow remained elevated. No significant blood pressure changes were noted.

    Conclusions:

    • Menopausal flushes are associated with significant peripheral circulatory alterations, particularly in hand blood flow.
    • These circulatory changes are likely mediated by altered autonomic nervous system activity.
    • Menopausal flushes may represent a manifestation of broader thermoregulatory disturbances during menopause.

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