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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Journal of Human Hypertension - Blood pressure measurement in an The measurement of blood pressure (BP) is one of the most commonly .. of the laws of the Member States relating to units of measurement and on the repeal Pressure - Wikipedia, the free encyclopedia These manometric units are still encountered in many fields. Blood pressure is measured in millimeters of mercury in most of the world, and lung pressures Units: M This very small unit is used to measure the pressure of sound waves. .. In medicine, blood pressure is traditionally recorded in mm Hg. In engineering, Checking Up on Blood Pressure Monitors Blood pressure is typically measured in units of millimeters of mercury, and represents Regardless of the type of device used to measure blood pressure, Blood Pressure Monitoring at Home -- familydoctor.org To measure your blood pressure at home, you can use either an aneroid Since home blood pressure units vary in price, you may have to shop around. Home Blood Pressure Monitoring Patient Instructions - UMHS The wrist and finger units, although easy to use, are not exact for the measure of blood pressure. A proper sized cuff is needed for the exact measure of Blood Pressure Measurement - Definition, Purpose, Precautions The electronic units are also calibrated to display the measurement in millimeters of mercury. Blood pressure can be measured with either unit, The Unified Code for Units of Measure Instead the prefix at non-ratio units scales the measurement value. Likewise, the central venous blood pressure is often measured using simple water Blood pressure measurement -- Ward and Langton 7 (4): 122 Blood pressure measurement, in combination with pulse oximetry and Although the System International d'unites (SI) unit of pressure is the Pascal TRIMLINE Medical Products gCHANGE NOTICE - Unit of Measure and Part Number Changes Effective October 1, 2007. This change affects Tempa-Kuff^ Blood Pressure Cuffs that are packaged How to measure blood pressure : The sphygmomanometer It will thus be necessary to think of solutions for replacement, and to change the unit of measurement of the blood pressure (millimetre of mercury replaced |
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