Active vasodilation during fainting: A hypothesis revisited

Abstract

The current concept is that the vasodilation which contributes to fainting (vasovagal syncope) is caused entirely by withdrawal of sympathetic vasoconstrictor tone (i.e. passive vasodilation).1,2 This concept has supplanted the idea that an active, sympathetically mediated component to the vasodilation exists in humans.3 We have several lines of evidence… (More)
DOI: 10.1007/BF02291139

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