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 is Blood Pressure Measured? There are several ways to measure blood pressure. Here are explanations of the most common methods. How Is Blood Pressure Measured? Find out how a blood pressure cuff works, and how your doctor uses it to check your blood pressure. How is Blood Pressure Measured? Blood pressure is measured in millimeters of mercury (mm Hg). A typical normal blood pressure is 120/80 mm Hg, or 120 over 80. The first number represents Proper Technique for Blood Pressure Measurement - How to Measure The ability to correctly measure blood pressure is a specialized skill that requires careful attention to many important details. A wide variety of factors How to measure blood pressure How blood pressure is measured An overview of current devices used to measure blood pressure can be found here. How to measure blood pressure using a How To Measure Blood Pressure, And What It All Means How To Measure Blood Pressure, And What It All Means. Here are the tools: A Stethoscope and a Sphygmomanometer. You inflate the sphygmomanometer (blood Blood Pressure Monitoring at Home -- familydoctor.org To measure your blood pressure at home, you can use either an aneroid Tests have shown that finger/wrist devices do not measure blood pressure very How to measure blood pressure correctly and get accurate blood Information to help people measure their blood pressure accurately at home. Blood pressure - Wikipedia, the free encyclopedia âœDon't drink coffee or smoke cigarettes 30 minutes before having your blood pressure measured. Before the test, sit for 5 minutes with your back supported Measuring Blood Pressure, what the numbers mean. If you have high blood pressure, how often you need to be measured will depend When you have your blood pressure measured, it is written down as two Blood pressure measurement How is blood pressure measured? To take a blood pressure reading, you need to be relaxed and comfortably seated, with your arm well supported. |
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