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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New high blood pressure guidelines say start early, treat aggressively Clinical practice guidelines were issued for the prevention, detection, and treatment of high blood pressure by the National Heart, Lung, and Blood Blood Pressure Guidelines - High Blood Pressure (Hypertension) and Contains NHLBI clinical guidelines for asthma, cholesterol and Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC 7) JNC 7 Express New High Blood Pressure (Hypertension) Guidelines. New High Blood Pressure (Hypertension) Guidelines Key aspects of the new guideline include the following:. For patients older than 50 years, systolic blood pressure of more than 140 mm Hg is a more Practice Guidelines - July 15, 2003 - American Family Physician Then a medical panel published new guidelines for treating high blood pressure, and her doctor tried her on three different pills. The Seattle Times: Health: New blood-pressure guidelines pay off This interactive guideline tool will assist the clinician in implementing the JNC 7 High Blood Pressure Guidelines at the point of care. The Seventh Report of the Joint National Committee on Prevention New US guidelines on hypertension take a stronger approach, reclassifying "high normal" blood pressure as "pre-hypertension" and calling for aggressive US guidelines say blood pressure of 120/80 mm Hg is not "normal (More information about the blood pressure guidelines and lifestyle recommendations, including eating plans, can be found here.) Diabetes Education and Research Center: New Blood Pressure The release of the 2007 recommendations for the management of hypertension (high blood pressure). |
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