Key result
Cutaneous vascular conductance did not increase during orthostatic-induced presyncope in heat-stressed individuals (0.91 vs 0.88 AU/mmHg; P=0.81), despite a decrease in skin blood flow.
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 responses do not appear to contribute to the reduction in blood pressure during vasovagal syncope in heat-stressed subjects.
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Suggests cutaneous responses do not mediate presyncope hypotension in heat stress; leaves open contributions from other vascular beds for confirmation.
Shibasaki et al. (2005) conducted an observational in Presyncope during orthostatic stress in heat stressed individuals (n=5). Orthostatic stress (lower body negative pressure) during heat stress vs. Baseline (1 min prior to presyncope) was evaluated on Cutaneous vascular conductance (CVC) (p=0.81). Cutaneous vascular conductance did not increase during orthostatic-induced presyncope in heat-stressed individuals (0.91 vs 0.88 AU/mmHg; P=0.81), despite a decrease in skin blood flow.
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