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.

blood pressure prehypertension
Your High Blood Pressure Questions Answered â” Guidelines Lowered
Even without any symptoms, a blood pressure level in the prehypertensive range can increase your risk of stroke, heart attack, heart failure and kidney

Hypertension - High Blood Pressure - High Blood Pressure Symptoms
Testing for hypertension; Monitoring blood pressure at home. Treating high blood pressure: An overview. If your reading is normal; Prehypertension

Effects of normal blood pressure, prehypertension and hypertension
Background. The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (BP) provide

DHDSP - About High Blood Pressure
Prehypertension is defined as a systolic blood pressure of 120â“139 mmHg or a diastolic blood pressure of 80â“89 mmHg. Persons with prehypertension are at

High pressure tactics: 45 million Americans are now considered
So far, I'm the exception, but my blood pressure has been creeping upward to the point that on some days I'm within the "prehypertensive" category.

Prehypertension - MayoClinic.com
Blood pressure is the force exerted on your artery walls as blood flows through your body. Slightly elevated blood pressure is known as prehypertension.

Effects of Normal Blood Pressure, Prehypertension, and
Effects of Normal Blood Pressure, Prehypertension, and Hypertension on Coronary Microvascular Function. Dogan Erdogan, MD; Ibrahim Yildirim, MD;

MedlinePlus Medical Encyclopedia: High blood pressure (Hypertension)
Pre-hypertension is when your systolic blood pressure is between 120 and 139 or your diastolic blood pressure is between 80 and 89 on multiple readings.

What Is High Blood Pressure?
Prehypertension is blood pressure between 120 and 139 for the top number, or between 80 and 89 for the bottom number. For example, blood pressure readings

Prehypertension: Early-stage High Blood Pressure- WebMD
Information on prehypertension -- a new category of early-stage high blood pressure (hypertension).

Prehypertension
According to the new guidelines, if you are prehypertensive, you should lower your blood pressure with lifestyle changes. That, as we have already discussed

Revised Blood Pressure Guidelines Put Millions in New Category
For most people classified as prehypertensive, these measures alone could lower their blood pressure readings to normal levels. If thatâ™s not possible,

High Blood Pressure: Online References For Health Concerns
Men and women with prehypertension (120-139/80-89 mm Hg) should have a goal of lowering their blood pressure to 115/75 mm Hg, unless they have chronic

Prehypertension - Topic Overview - MSN Health & Fitness - High
Prehypertension is blood pressure that is higher than normal but not high High blood pressure is 140/90 or higher. Prehypertension is between 120/80 and

Thieme-connect - Abstract
Ambulatory blood pressure measurement in prehypertension: Analysis of the PHARAO-Study: Prevention of Hypertension with the ACE-inhibitor Ramipril in

Progression From Adolescent Prehypertension To High Blood Pressure
A study of more than eight thousand adolescents indicates that, without pharmacological treatment or life-style changes, young people with prehypertension

Prehypertension Is 'On The Map' Of Cardiovascular Risk Factors
At the start of the study, 26 percent had normal blood pressure, 39 percent had prehypertension and 35 percent had hypertension. Prehypertension rates among

Johns Hopkins: Hyptertension|Stroke on prehypertension and
Prehypertension. People with a systolic blood pressure (the top number in a blood pressure reading) between 120 and 139 mm Hg or a diastolic blood pressure

What Are High Blood Pressure and Prehypertension?
If your blood pressure is between 120/80 mmHg and 139/89 mmHg, then you have prehypertension. This means that you don't have high blood pressure now but are


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