What is the definition or description of: neurally mediated reflex syncope?

Syncope: A simple description is that physical or psychological stimuli cause nervous system reflexes to slow the heart and lower the blood pressure the result being the patient passes out.

Fainting: Vasovagal syncope is a common condition that impacts 1/3 of the population. It is an abnormal heart reflex that cuases patients to pass out. Vasovagal syncope typically occurs while standing often in a hot environment. Prior to syncope patient's feel lightheaded. They feel tired following syncope. Treatment includes increase salt and fluid.