Key result
Cutaneous vascular conductance did not significantly change during orthostatic-induced presyncope in heat-stressed individuals (0.88 vs 0.91 AU/mmHg; P=0.81).
Why the study?
Does cutaneous vascular conductance increase during orthostatic-induced presyncope in heat stressed individuals?
Observational (n=5)
Does cutaneous vascular conductance increase during orthostatic-induced presyncope in heat stressed individuals?
Absolute Event Rate: 0.91% vs 0.88%
p-value: p=0.81
Cutaneous vascular conductance does not increase during presyncope in heat-stressed individuals, suggesting it does not contribute to the associated blood pressure drop.
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Argues against cutaneous vasodilation driving presyncopal BP drop; leaves open mechanisms of orthostatic intolerance in heat stress.
Shibasaki et al. (2005) conducted an observational in Presyncope during orthostatic stress in heat-stressed individuals (n=5). Lower body negative pressure while heat stressed vs. 1 min prior to presyncope was evaluated on Cutaneous vascular conductance (CVC) (p=0.81). Cutaneous vascular conductance did not significantly change during orthostatic-induced presyncope in heat-stressed individuals (0.88 vs 0.91 AU/mmHg; P=0.81).
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