So, while anything is possible, none of the diseases is particularly likely. Once this is recognized, the symptoms of the syndrome usually disappear. N - Neurocardiogenic Syncope Fainting that is currently thought to be due to a hyperactive reflex between the heart and the brain. The loss of consciousness begins gradually, over seconds to minutes, so that the person usually has time to sit down or at least to cushion the fall. Often, the person with neurocardiogenic syncope notices nausea and sweatiness before losing consciousness.
Several medications reduce or eliminate the occurrence of fainting episodes.
These include the beta blockers and some anticholinergic agents, as well as newer therapies wih serotonin upake inhibitors. This is a useful concept because the blood pressure usually falls a little bit when a person changes from the lying to the sitting and the sitting to the standing positions. In some cases, however, the blood presssure falls a lot so that the person feels faint. Another important cause of orthostasis is dehydration, either from insufficient oral fluid intake or from fluid loss such as internal bleeding. A test for clinically significant orthostasis is done in three stages.