Vasovagal reaction means: Vasovagal reaction is a reflex of the voluntary nervous system. It causes bradycardia to be slowed down and also affects nerves that supply blood to legs, allowing them to widen. The heart pumps less blood and blood pressure falls. Blood that is circulated tends to flow into the legs, rather than the head. This causes the brain to lose oxygen, causing fainting episodes. A vasovagal attack is another name for the vasovagal response. It is also known as situational syncope or vasovagal syncope. Also see: Syncope.
(in Medical Dictionary)