Duration minutes vs hours The article currently says The autonomic nervous system s physiologic state see below leading to loss of consciousness may persist for several minutes so If sufferers try to sit or stand when they wake up they may pass out again The person may be nauseated pale and sweaty for several minutes or hours This is confusingly vague and unsourced My experience is that an episode of of vasovagal response typically lasts 3 15 minutes but can persist indefinitely at least a couple hours What good sources are there for improving this aspect of the article