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Erschienen in: Clinical Autonomic Research 4/2023

09.06.2023 | Letter to the Editor

Heart rate variability between hormone phases of the menstrual and oral contraceptive pill cycles of young women

verfasst von: Emily F. Blake, Lauren E. Eagan, Sushant M. Ranadive

Erschienen in: Clinical Autonomic Research | Ausgabe 4/2023

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Abstract

Introduction

The interplay between the sympathetic and parasympathetic branches of the autonomic nervous system contribute to adequate hemodynamic responses to stressors, reflected by the variation in intervals between heart beats, known as heart rate variability. The sex hormones estrogen and progesterone have been shown to affect autonomic function. The extent to which autonomic function may vary between different hormone phases of the natural menstrual cycle and how this relationship may differ in women taking oral contraceptives has yet to be fully elucidated.

Purpose

To investigate differences in heart rate variability between the early follicular and early luteal phases of the menstrual cycle in naturally menstruating women and in oral contraceptive pill users.

Methods

Twenty-two young (22 ± 3 years), healthy women who were naturally menstruating or taking oral contraceptive pills participated in this study. Heart rate variability was measured at rest and during two sympathomimetic stressors: isometric handgrip exercise and cold pressor test.

Results

The proportion of successive NN intervals that differ by more than 50 ms was higher in oral contraceptive pill users during the placebo pill phase. Absolute high-frequency power was higher in the naturally menstruating women during the early luteal phase, relative to the early follicular phase. Other indices of vagal modulation were not different at rest or during sympathetic activation between hormone phases or groups.

Conclusions

Vagal modulation may be increased in the early luteal menstrual cycle phase. Further,oral contraceptive use does not appear to adversely affect this modulation in young, healthy women.
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Metadaten
Titel
Heart rate variability between hormone phases of the menstrual and oral contraceptive pill cycles of young women
verfasst von
Emily F. Blake
Lauren E. Eagan
Sushant M. Ranadive
Publikationsdatum
09.06.2023
Verlag
Springer Berlin Heidelberg
Erschienen in
Clinical Autonomic Research / Ausgabe 4/2023
Print ISSN: 0959-9851
Elektronische ISSN: 1619-1560
DOI
https://doi.org/10.1007/s10286-023-00951-z

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