Atherosclerosis is dangerous because it's so stealthy. This process of narrowing and hardening of the arteries occurs over decades, usually without any symptoms.
Heart attacks and strokes caused by atherosclerosis are responsible for hundreds of thousands of deaths each year. But diseases caused by atherosclerosis also lead to chronic pain, kidney failure, blindness, and even impotence.
It's time to shine some light on these hidden complications of atherosclerosis -- and to learn how to...
one time is usually nothing to worry about. But it is a good idea to see your
doctor, because fainting could have a serious cause.
What causes fainting?
Fainting is caused by a drop
in blood flow to the brain. After you lose consciousness and fall or lie down,
more blood can flow to your brain so you wake up again.
common causes of fainting are usually not signs of a more serious illness. In these cases, you faint because
The vasovagal reflex, which causes the heart
rate to slow and the blood vessels to widen, or dilate. As a result, blood
pools in the lower body and less blood goes to the brain. This reflex can be
triggered by many things, including stress, pain, fear, coughing, holding your
breath, and urinating.
Fainting caused by the vasovagal reflex is often easy to
predict. It happens to some people every time they have to get a shot or they
see blood. Some people know they are going to faint because they have symptoms
beforehand, such as feeling weak, nauseated, hot, or dizzy. After they wake up,
they may feel confused, dizzy, or ill for a while.
Some causes of
fainting can be serious. These include: