Cutaneous postural vasoconstriction is modified by exogenous but not endogenous female hormones in young women

Bishop, Gemma Dawn; Brown, Margaret D.

doi:10.1007/s10286-006-0393-9

Cited by 4 publications

(2 citation statements)

References 56 publications

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“…Further, differences in hormone levels between LP and the other menstrual cycle phases and between LP and the PMW were similar. Taken together, along with previous studies where no differences in other physiological responses such as orthostatic tolerance [7] and cutaneous postural vasoconstriction [3] were observed throughout the menstrual cycle, these results suggest that ovarian hormones, especially progesterone, might play a less important role in regulating breathing patterns than does aging [8,9,30].…”

Section: J Methodological Considerationssupporting

confidence: 68%

Effects of ovarian hormones and aging on respiratory sinus arrhythmia and breathing patterns in women

et al. 2008

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We investigated the effect of ovarian hormones and aging on breathing pattern [pulmonary minute ventilation (V(E))], tidal volume (V(T)), breathing frequency (F(b)), and respiratory sinus arrhythmia (RSA) in women. Recordings of V(E) and electrocardiogram (ECG) were obtained from 23 healthy women (10 premenopausal, 13 postmenopausal) under resting, isocapnic hypoxia (IH), and euoxic hypercapnia (EH) conditions. Premenopausal women were tested on three different days, each day corresponding to a specific phase of the menstrual cycle (follicular, mid-cycle, and luteal); postmenopausal women (PMW) were tested on 1 day only. On each test day, subjects were challenged with IH and EH. The order of the two tests was randomized and separated by at least 1 hour. Due to the low F (b) of several PMW, the band limits for RSA analysis had to be adjusted. The spectral coherence between respiratory flow and ECG RR-interval was used to determine the spectral band. Within the spectral band, there was a consistent phase relationship between the two variables where high values of spectral coherence indicate a well-defined phase relationship between respiratory flow and RR-interval variability. The main findings in this study for RSA are fourfold. First, RSA did not change with different levels of ovarian hormones (progesterone, serum 17beta-estradiol) during the menstrual cycle. Second, RSA was not influenced by hormone replacement therapy. Third, RSA did not change with age. Fourth, RSA did not change with IH and EH-induced changes in breathing patterns. Finally, high individual variability of average RR-interval change per breath was found.

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Section: J Methodological Considerationssupporting

confidence: 68%

Effects of ovarian hormones and aging on respiratory sinus arrhythmia and breathing patterns in women

et al. 2008

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“…The mechanisms of local vasoconstriction, i.e., VAR and myogenic response, have been evaluated during venous congestion by cuff inflation, and by lowering the limb below heart level (limb dependency) (2,25,27,31). During cuff inflation the reduction in blood flow may not be solely due to the VAR.…”

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confidence: 99%

Local vasoconstriction in spinal cord-injured and able-bodied individuals

Kooijman¹,

Hoog²,

Rongen³

et al. 2007

Journal of Applied Physiology

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Local vasoconstriction plays an important role in maintaining blood pressure in spinal cord-injured individuals (SCI). We aimed to unravel the mechanisms of local vasoconstriction [venoarteriolar reflex (VAR) and myogenic response] using both limb dependency and cuff inflation in SCI and compare these with control subjects. Limb blood flow was measured in 11 male SCI (age: 24-55 yr old) and 9 male controls (age: 23-56 yr old) using venous occlusion plethysmography in forearm and calf during three levels of 1) limb dependency, and 2) cuff inflation. During limb dependency, vasoconstriction relies on both the VAR and the myogenic response. During cuff inflation, the decrease in blood flow is caused by the VAR and by a decrease in arteriovenous pressure difference, whereas the myogenic response does not play a role. At the highest level of leg dependency, the percent increase in calf vascular resistance (mean arterial pressure/calf blood flow) was more pronounced in SCI than in controls (SCI 186 +/- 53%; controls 51 +/- 17%; P = 0.032). In contrast, during cuff inflation, no differences were found between SCI and controls (SCI 17 +/- 17%; controls 14 +/- 10%). Percent changes in forearm vascular resistance in response to either forearm dependency or forearm cuff inflation were equal in both groups. Thus local vasoconstriction during dependency of the paralyzed leg in SCI is enhanced. The contribution of the VAR to local vasoconstriction does not differ between the groups, since no differences between groups existed for cuff inflation. Therefore, the augmented local vasoconstriction in SCI during leg dependency relies, most likely, on the myogenic response.

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The effects of oral contraceptives on resting autonomic function and the autonomic response to physiological stressors: a systematic review

Pereira,

Bouakkar,

Johnston

et al. 2023

Clin Auton Res

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Cutaneous postural vasoconstriction is modified by exogenous but not endogenous female hormones in young women

Cited by 4 publications

References 56 publications

Effects of ovarian hormones and aging on respiratory sinus arrhythmia and breathing patterns in women

Effects of ovarian hormones and aging on respiratory sinus arrhythmia and breathing patterns in women

Local vasoconstriction in spinal cord-injured and able-bodied individuals

The effects of oral contraceptives on resting autonomic function and the autonomic response to physiological stressors: a systematic review

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