Key result
In response to simulated carotid hypertension, older women demonstrated greater increases in leg vascular conductance (+19.1% vs -11.5%; P<0.05) and blunted cardiac output responses than young women.
Why the study?
Does aging alter carotid baroreflex control of blood pressure and leg vascular conductance in women?
Population
20 women, comprising 10 young (mean age 21 ± 1 yr) and 10 older (mean age 62 ± 2 yr) women.
Comparison
5-s pulses of neck suction and neck pressure to… vs Comparison between young and older women
Design
Cross-sectional
Authors
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Highlights potential age-dependent baroreflex adaptations in women; extends understanding of sex-specific control but requires longitudinal validation.
Cross-Sectional (n=20)
Does aging alter carotid baroreflex control of blood pressure and leg vascular conductance in women?
Absolute Event Rate: 19.1% vs -11.5%
p-value: p=< 0.05
Older women exhibit a blunted blood pressure response to hypotensive stimuli and rely more on vascular conductance rather than cardiac output for baroreflex-mediated blood pressure regulation compared to young women.
Credeur et al. (2014) conducted a cross-sectional in Aging (n=20). Older age vs. Young age was evaluated on Change in leg vascular conductance (LVC) at the time of peak MAP following neck suction (p=< 0.05). In response to simulated carotid hypertension, older women demonstrated greater increases in leg vascular conductance (+19.1% vs -11.5%; P<0.05) and blunted cardiac output responses than young women.
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