Vaso- Vagal

Vaso: Blood vessels, vascular

Vagal: Vagal nerve

The correct spelling is vasovagal and it has to do with action of the vagus nerve to slow down the heart and other actions that can lead to a drop in blood pressure or even fainting. Vagal maneuvers include splashing cold water on your face, straining on the toilet and standing on your head.

If you faint on seeing blood, it it likely a vaso-vagal reaction.

It is part of the nervous system that has a direct effect upon the heart. This nerve runs from your brain to your Butt.

This is why bearing down to have a bowel movement can kill an elderly person, and why it slows the heart rate in healthy people.

The same nerve is effected by a deep hard cough, which is another way to stimulate the nerve and slow the heart rate.

There is one more trick, and that is called the divers reflex or divers response, you get a large bowl of cold water and put your face in it. This too can slow the heart rate down.