What is Cholesterol?

Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication.

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Night Twitches Spike BP in Restless Leg Syndrome
Researchers say significant blood-pressure changes in people with periodic leg Nocturnal blood pressure changes in patients with restless legs syndrome.

Energy Drinks Might Spike your Blood Pressure « You Are What You Eat
Energy Drinks Might Spike your Blood Pressure. Energy drinks boost blood pressure in even the young and healthy people and may leave hypertensive adults

Rapid heart rate & spike in blood pressure while working out
This is a discussion on MedHelp about Rapid heart rate & spike in blood pressure while working out!. Community members of MedHelp provide help, support,

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WikiAnswers - What might cause dizziness nausea and a blood
What might cause dizziness nausea and a blood pressure spike from 134 over 58 to 226 over 87 in a very healthy 78-yr-old female and tests indicate no stroke

Dry Eye Talk - Restasis-induced blood pressure spike
She mentioned that although her dry eye symptoms benefitted from Restasis, her doctor had to take her off it because her blood pressure shot up nearly to

Blood pressure readings - taking your vital signs
Other environmental factors, such as an extra cup of coffee or a stressful commute, can temporarily spike your blood pressure.

Inherently Ridiculous: But a Blood Pressure Spike Nonetheless
But a Blood Pressure Spike Nonetheless. The Scene: Alii and I, chillin' on the couch, enhancing our educational experience, happy, calm, minding our own

American Heart Association Forums: High Blood Pressure Spike?
Any ideas what could cause a spike in BP like this? What do you think of Altace? (By the way my mother had high blood pressure). Thanks.

Caffeine: How does it affect blood pressure? - MayoClinic.com
Among people who don't consume caffeine on a regular basis, caffeine can cause a temporary but sharp rise in blood pressure. Exactly what causes this spike

Why does blood pressure spike higher than usual when you wake up
Why does blood pressure spike higher than usual when you wake up in the morning?

Exercise Hypertension
Hypertension is persistent abnormally high blood pressure which, systolic blood pressure of around 200 mmHg at maximal exercise rates, they may spike at

Adrenal glands and the rest of you: an interview with Decker Weiss
Elevated blood pressure affects the eyes, heart, and kidneys, and it slowly increases the risk of all types of other problems. Q. If you have a quick spike

Women and High Blood Pressure | AHealthyMe.com
Even sitting up made her blood pressure spike, she says, sometimes by 10 points. Highway to heart disease. The risk of high blood pressure also increases as

Prehypertension: Early-stage High Blood Pressure- WebMD
The next day, I woke up in a blood pressure danger zone. What happened? My blood pressure didn't spike overnight; instead, government officials issued

Stress-Induced Blood Pressure Spike Linked To Increased Stroke Risk
For the first time, stress has been linked to increased stroke risk in a population study of middle-aged white men, researchers report in the June issue of

sudden spikes in blood pressure Archive - HealthBoards.com
My husband has been experiencing episodes in which his pulse rate drops rapidly accompanied by a spike in blood pressure from normal readings to as high as

Stress-induced blood pressure spike linked to increased stroke risk
âœWeâ™ve found that exaggerated blood pressure reactions to stress are related to a greater risk of having a stroke. This is an important area of research to


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