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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Understanding Low Blood Pressure -- Treatment
Your doctor can determine if you have significant low blood pressure. It's important to identify the cause of low blood pressure so appropriate

Low Birth Weight Predicts Higher Blood Pressure But Not Dermal
The association between low birth weight and high blood pressure is well by means of a cut-off of the 10th percentile on Gairdner-Pearson growth charts.

Low blood pressure (hypotension) - Yahoo! Health
High blood pressure's neglected sibling, low blood pressure (hypotension) Many people who have low blood pressure (hypotension) are healthy and have no

Low blood pressure and depression in older men: a population based
As Table III shows, the number of chronic conditions was associated with the mean score on the Beck depression inventory but not with low blood pressure.

Blood Pressure Monitors
Although we often talk about the problem of high blood pressure, remember that low blood pressure can also be a problem which needs to be investigated.

High Blood Pressure Symptoms | Causes | Diet | Treatment
Here is a chart for high blood pressure, chart for low blood pressure, blood pressure measuring chart. Causes of High Blood pressure | Hypertension

Fainting: Low Blood Pressure: Merck Manual Home Edition
It is caused by orthostatic hypotension (see Low Blood Pressure: Orthostatic Hypotension). In orthostatic hypotension, the compensatory mechanisms,

Blood Pressure, A Doctor's Practical Guide With Insider's Tips
Does low blood pressure cause symptoms? Or is it another silent killer? Making a blood pressure chart from your readings is not very difficult.

A tilt table test reveals low blood pressure (neurally mediated
A tilt table test often reveals low blood pressure (neurally mediated hypotension - NMH) problems in fibromyalgia and chronic fatigue patients.

Blood pressure - Wikipedia, the free encyclopedia
Blood pressure that is too low is known as hypotension. The similarity in pronunciation with . Creating Your Own Blood Pressure Chart. ^ NHLBI.

Blood Pressure Chart - Normal Blood Pressure Range
Normal blood pressure range chart, using a blood pressure monitor. This Vaughns Low-High Normal Blood Pressure Chart webpage was updated on 2007-09-26.

Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and
Learn about low blood pressure (hypotension) is blood pressure below normal. Once low blood pressure has been identified as the cause of symptoms,

Tilt-table Test - Health and Medical Information Produced by
Low Blood Pressure - Learn about low blood pressure (hypotension) is blood pressure below normal. Low blood pressure symptoms may include: lightheadedness,

Low blood pressure
At this time, it was thought that low blood pressure was a major cause of depression and tiredness. Many people were quite wrongly treated for low blood

Blood Pressure Guide
Chart of normal blood pressure is a Ready Reckoner When BP is low, there is not sufficient flow of blood to deliver enough oxygen and food to vital

Low Blood Pressure Dangers - Hypotension - Low Carb
Low blood pressure is known as hypotension. It is in essence the opposite of Healthy Blood Pressure Chart · High Blood Pressure Dangers and Information

Healthy Blood Pressure Chart - Low Carb
Is your blood pressure healthy? Just how does your blood pressure compare to people in your age group? Check these charts and find out!

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Using an electric blood pressure monitor is as simple as that? Chart of normal blood pressure is a Ready Reckoner Low Blood Pressure: An Overview


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