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Related Experiment Videos

Cardiovascular functioning during the menstrual cycle.

V H Moran1, H L Leathard, J Coley

  • 1Department of Nursing Studies, St Martin's College, Lancaster, UK.

Clinical Physiology (Oxford, England)
|December 2, 2000
PubMed
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Cardiovascular functioning, including blood pressure and heart rate, shows significant variations across menstrual cycle phases. These changes are linked to hormonal shifts and impact fitness indicators like the Schneider Index and Rate-Pressure Product.

Area of Science:

  • Reproductive Endocrinology
  • Cardiovascular Physiology
  • Women's Health

Background:

  • Menstrual cycle-related cardiovascular variations are under-researched.
  • Ovarian steroids are known to influence physiological functions.

Purpose of the Study:

  • To investigate cardiovascular functioning variations during the normal menstrual cycle.
  • To correlate these variations with hormonal phases.

Main Methods:

  • Monitored resting blood pressure, heart rate, Rate-Pressure Product (RPP), and Schneider Index in 26 women over 5 weeks.
  • Utilized daily urine samples for hormonal assays to define menstrual cycle phases.
  • Standardized daily measurements (Monday-Friday) at consistent times.

Main Results:

Related Experiment Videos

  • Resting systolic blood pressure was highest during the ovulatory phase.
  • Resting heart rate was elevated in ovulatory and luteal phases compared to menstrual and follicular phases.
  • Schneider Index peaked in the follicular phase, while RPP was highest in the ovulatory phase.

Conclusions:

  • Established a pattern of menstrual cycle-related cardiovascular variations.
  • Linked observed cardiovascular changes to the known effects of ovarian steroids.
  • Highlights the importance of considering menstrual cycle phase in cardiovascular research.