Reflex syncope

It is a temporary loss of consciousness or fainting caused by a short-lived reduction (between seconds to a few minutes) in blood flow to the brain. The symptoms are caused by stimulation of the vagus nerve, which is where the name comes from. This nerve is responsible for regulating the circulatory system; its stimulation causes the heart rate to drop and blood vessels to dilate (parasympathetic nervous system). It is a "reflex" that generally presents with: sudden changes of position, standing or sitting for a long time without changing position, emotional stress and feeling very intense pain. It manifests with loss of bodily function and consciousness. Before fainting, there are symptoms that usually appear: nausea, pallor, sweating, cold skin with sweating. Diagnosis is clinical; other tests will be conducted if there are doubts about the cause. During initial care, you should place the person’s head below their body to facilitate the return of blood to the brain. They must not be given anything to eat or drink until the person completely regains consciousness.