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.
In fact, getting the blood pressure down this much in very old people has not been found to reduce their risk of dying. In addition, many individuals over the age of 65 may feel dizzy, fall or pass out when they stand suddenly due to blood pressure that is suddenly too low. This condition, known as postural or orthostatic hypotension, poses a danger of fractures and other serious injury.