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.
Fainting, which is also called syncope, can be caused by many different things. Sometimes a specific cause for fainting cannot be found. A sudden drop in your blood pressure can cause you to faint. Sometimes your heart rate and blood vessels canât react fast enough when your bodyâs need for oxygen changes. This is very common among older people and in people who have certain health conditions, such as diabetes. Fainting can happen when: 1  You stand up too fast. 2  You work or play hard, especially if itâs very hot. 3  You begin to breathe too fast (called hyperventilating). 4  You get very upset. Being upset can affect the nerves that control your blood pressure. 5  Youâre taking medicine for high blood pressure.