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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Vital Signs
In children, pulse and blood pressure vary with the age. With an irregular pulse, the beats counted in any 15 second period may not represent the

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LifeSource's Clinically Validated blood pressure monitors include a Lifetime Warranty. Some models include the Irregular Heartbeat Feature, which allows for

Do diabetics have irregular blood pressure?
Subject: Do diabetics have irregular blood pressure? Date: Tue Jul 24 20:33:02 2001 Posted by Elena Rodriguez Grade level: undergrad School: UC Berkeley

MedlinePlus Medical Encyclopedia: Heart palpitations
Heartbeat sensations; Irregular heartbeat; Palpitations; Heart pounding or racing . Make sure that your blood pressure and cholesterol are under control.

High Blood Pressure Or Irregular Heartbeat Linked To Alzheimer's
Alzheimer's disease may progress more rapidly in people with high blood pressure or a form of irregular heartbeat, atrial fibrillation, according to an

Natural Remedies for Coronary Heart Diseases and Heart Attacks
When people with high blood pressure were given one clove of garlic a The best way to prevent coronary artery disease is to control high blood pressure,

Pheochromocytoma and irregular blood pressure
The graph shows a nine-day period of short, irregular bursts in blood pressure due to a pheochromocytoma. The lower points represent diastolic pressure

High blood pressure and exercise: Why activity is key - MayoClinic.com
High blood pressure and exercise â” Here's what the connection means to you. Severe shortness of breath; An irregular heartbeat; Excessive fatigue

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Subject: Irregular Blood Pressure Answered by: Susan Eagles "Normal" blood pressure varies with age. The normal blood pressure of a healthy young adult

Blood pressure - Wikipedia, the free encyclopedia
Arterial blood pressure (BP) is most accurately measured invasively. enabling irregular heartbeat patients to accurately measure their blood pressure at

Blood Pressure Changes Causes - Changes In Blood Pressure
You may take this drug if you have been diagnosed with irregular heartbeats, palpitations, heart failure, or high blood pressure.


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