In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters, and must be clearly distinguished from the other variables. For example, in.
Vasovagal syncope is a common cause of fainting. The vagus nerve is overstimulated and causes the body's blood vessels to dilate and the heart to slow down. This anti-adrenaline effect decreases the ability of the heart to pump blood upward to the brain against gravity. Without blood flow, the brain turns off.
This leads the blood vessels in your legs to widen, allowing excess blood to collect in your legs, which lowers your blood pressure. As a result, thereâs a sudden drop in blood flow to your brain, and that's what causes you to pass out. This kind of fainting is normally not a sign of something serious.