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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HealthLINK: Cardiac: New blood test predicts cardiac risk - Yale We also know that damage to arteries begins at fairly low blood pressure levelsâ”those formally considered normal and optimal," he added. Health 24 - Hypertension, Explaining Hypertension Researchers are of the opinion that normal blood pressure should not exceed 130/85 mm Hg, with the highest reading considered normal being 140/90 mm Hg. Prehypertension: Early-stage High Blood Pressure- WebMD People with blood pressure levels between 120/80 and 140/90 - levels once considered normal - have twice the risk of heart disease as those with low blood DHDSP - About High Blood Pressure For example, a person with a high systolic pressure but a normal diastolic pressure will be considered to have high blood pressure (sometimes referred to as Normal Blood Pressure Readings - Natural Blood Pressure Medication In adults, a systolic pressure of between 90 and 120 mmHg and a diastolic pressure of less than 80 mmHg is considered normal. If your blood pressure At what point is a BP reading considered low blood pressure "Normal" blood pressure is 120/80, but if mine went that high, Anything below 90 systolic (top number) is considered to be "low blood pressure". Nature Clinical Practice Neurology | The diagnosis and treatment Changes in Cerebral Blood Flow During Cerebrospinal Fluid Pressure Manipulation in Patients With Normal Pressure Hydrocephalus: A Methodological Study Low blood pressure (hypotension) - MayoClinic.com In fact, in recent years there has been an ongoing downward revision of what is considered a normal blood pressure reading. A blood pressure less than The New "Normal" Blood Pressure: What Are the Implications for The New "Normal" Blood Pressure: What Are the Implications for Family Medicine? 129 mm Hg systolic and 80 to 84 mm Hg diastolic, were considered normal. What is considered normal or good blood pressure? | Answerbag.com What is considered normal or good blood pressure? You can read about blood pressure readings and how to treat high blood pressure on the following site. ScienceDirect - The American Journal of Medicine : Blood Pressure The designation of prehypertension, blood pressure levels usually considered normal, has raised concerns. The new category will swell the ranks of A Special Message for Women What your blood pressure level means Learn your blood pressure numbers. A reading of less than 120/80 mm Hg is considered normal. Blood pressure usually considered normal is associated with an The exposure variables were blood pressure levels: high normal blood pressure, systolic blood pressure 130-139 mm Hg or diastolic blood pressure 85-89 mm Hg What Was Normal Blood Pressure Is Now Considered Too High (Tufts For years your blood pressure has hovered around 135/85, which your doctor always said was normal and sent you on your way. Not on your next visit. What is Considered Normal Blood Pressure? Blood pressure readings less than 120/80 are considered normal. Blood pressure - Wikipedia, the free encyclopedia Prehypertension is now considered to be a systolic pressure ranging from 120 to . Medicine : The Normal Difference in Bilateral Indirect Blood Pressure What is blood pressure? Blood pressure and hypertension facts. Learn what is considered a normal blood A blood pressure of 140/90 or higher is considered high blood pressure. Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Normal diastolic blood pressure falls between 60 and 80 mm Hg. Current guidelines Blood pressures over 130/80 are considered high. High blood pressure What Is High Blood Pressure? A blood pressure reading below 120/80 mmHg is considered normal. In general, lower is better. However, very low blood pressure can sometimes be a cause for |
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