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The relationship between muscle sympathetic nerve activity and systemic hemodynamics is altered in women with uterine fibroids
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The relationship between muscle sympathetic nerve activity and systemic hemodynamics is altered in women with uterine fibroids
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Journal Article
The relationship between muscle sympathetic nerve activity and systemic hemodynamics is altered in women with uterine fibroids
2022
Overview
Women with uterine fibroids (UF), benign tumors of the myometrium, have a higher prevalence of hypertension than women without UF. The cause for this relationship is unclear. Muscle sympathetic nerve activity (MSNA) is a regulator of arterial blood pressure, and it is possible that variations in MSNA predispose women with UF to develop hypertension. The purpose of this study was to assess baseline blood pressure and MSNA and the relationships between MSNA and systemic hemodynamics in women with and without UF. We measured blood pressure (brachial intra‐arterial line), MSNA (microneurography), and systemic hemodynamics (total peripheral resistance and cardiac output) at rest in 14 healthy, normotensive, premenopausal women with UF (42 ± 2 years old) and 9 healthy, normotensive, premenopausal women without UF (41 ± 2 years old). Baseline blood pressure and MSNA did not differ between groups (p > 0.05 for both). In women with UF, there was a positive correlation between MSNA and total peripheral resistance (r = 0.75, p = 0.02), as well as a negative correlation between MSNA and cardiac output (r = −0.73, p = 0.03). In contrast, these relationships were not seen in women without UF (p > 0.05 for both relationships). These data suggest that autonomic interactions with systemic hemodynamics, and thus blood pressure regulation, are different in healthy women with UF compared to healthy women without UF. Muscle sympathetic nerve activity is positively correlated with total peripheral resistance in women with uterine fibroids but not in women without uterine fibroids. Autonomic interactions with systemic hemodynamics, and thus blood pressure regulation, are different in women with uterine fibroids (who are otherwise healthy) compared to healthy women without uterine fibroids.
