..., by evaluating the cerebrovascular and central cardiovascular adaptation to orthostatic stress in patients with orthostatic hypotension due to sympathetic failure, and in age- and gender-matched control subjects. autonomic disease blood flow velocity cardiac output leg crossing near-IR spectroscopy...

... results are compatible with the hypothesis that a local vasoconstrictor mechanism is operative in the vascular resistance elements in closest relation with the capillary bed, and distal to that regulating arteriovenous shunt flow. blood flow velocity body temperature regulation capillaries foot...