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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How to assess mean blood pressure properly at the brachial artery Mesure pression; Pressure measurement; Medida presión; Artère humérale; Brachial artery; Arteria humeral; Pression sanguine; Blood pressure; Topical Analgesics and Blood Pressure during Static Contraction Changes in fingertip blood pressure accurately reflect concomitant changes in brachial artery blood pressure.17 However, differences in absolute blood Stock Illustration of Nurse centering blood pressure cuff over Nurse centering blood pressure cuff over left brachial artery (upper arm) of prone patient stock illustration by LifeART. Fotosearch Stock Photography and Science Links Japan | Blood Pressure Measurement over the Finger Since blood pressure is more easily measured over the finger artery than the brachial artery during dental treatment, this technique has been widely How to measure blood pressure The subject sits down and rests their arm on a table so the brachial artery is level with the heart. This is important when monitoring blood pressure, Blood pressure - Wikipedia, the free encyclopedia Listening with the stethoscope to the brachial artery at the elbow, the examiner slowly releases the pressure in the cuff. When blood just starts to flow in Brachial artery - Wikipedia, the free encyclopedia The pulse of the brachial artery is palpable on the anterior aspect of the elbow and, with the use of a stethoscope and sphygmomanometer (blood pressure Blood Vessels A rubber inflatable cuff is placed over the brachial artery and the pressure in the cuff is raised until the cuff pressure exceeds that of the blood in the Taking Your Blood Pressure Correctly - For Dummies Your blood pressure can be taken with a mercury blood pressure gauge, The cuff is inflated until the blood flow through your brachial artery stops. Taking a blood pressure When the pressure is great enough, it forcibly closes the main artery of the upper arm - the brachial artery. The stethoscope allows you to hear when the Digital and brachial artery blood pressure measurements during Digital and brachial artery blood pressure measurements during. peripheral, cold-induced vasoconstriction. M. A. Stroud, D. P. James, D. Railton, |
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