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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Blood pressure - how is it measured? - Everybody - Health How does a doctor or other health professional measure your blood pressure? High Blood Pressure - How It's Measured A person's blood pressure is commonly measured with an instrument called a blood pressure cuff or sphygmomanometer. The blood pressure cuff is made up of an Blood Pressure Testing and Measurement - NYU Medical Center, NYU In adults, blood pressure is typically (but not always) measured during each visit to the doctor. It is not routinely measured in children, unless there is High Blood Pressure All Subchapter Articles:, Diagnosing High Blood Pressure, Tests for High Blood Pressure, How Is Blood Pressure Measured? Font Size The Correlation between Systolic Blood Pressure Measured by Return The accurate measurement of blood pressure is essential to the conduct of a safe anesthetic. There is a continuing controversy over which means of blood Arch Neurol -- Abstract: Association of Incident Alzheimer Disease Association of Incident Alzheimer Disease and Blood Pressure Measured From 13 Years Before to 2 Years After Diagnosis in a Large Community Study Discovery Health :: Center Article :: How Is Blood Pressure Measured? For instance, a systolic pressure of 130 and a diastolic pressure of 75 is written as 130/75 and read as 130 over 75. Blood pressure is measured in High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis Blood pressure is measured with a blood pressure cuff and recorded as two numbers, such as 120/80 mm Hg (millimeters of mercury). Influence of nitric oxide-mediated vasodilation on the blood Systolic blood pressure (SBP) is frequently measured in rats by the tail cuff method, which usually comprises. pulse/flow disappearance and reappearance IngentaConnect Comparison of Blood Pressure Measured by In previous studies, oscillometric blood pressure measured from the supraorbital artery has been shown to agree quite well with pressure measured from the Evaluation of digital blood pressure measured with the Omron F3 Conclusions: Finger blood pressure, as measured with the Omron F3, misestimates brachial blood pressure in a high proportion of normal subjects. 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 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 How is Blood Pressure Measured? There are several ways to measure blood pressure. Here are explanations of the most common methods. Blood Pressure Measurement - How Blood Pressure is Measured Blood pressure is measured with two different noninvasive techniques, a manually performed technique known as auscultation and an automated technique known Blood Pressure Testing and Measurement Blood pressure is measured by a quick, painless test using a medical instrument called a sphygmomanometer (SFIG'mo-mah-NOM'eh-ter). 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. 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 How Is Blood Pressure Measured? Find out how a blood pressure cuff works, and how your doctor uses it to check your blood pressure. |
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