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 - Wikipedia, the free encyclopedia In practice, the pressure sensor is a calibrated electronic device with a numerical readout of blood pressure. To maintain accuracy, calibration must be Blood pressure measuring devices: recommendations of the European Despite the poor accuracy record of devices that measure blood pressure at the wrist and .. Accuracy of the Vita-Stat device in measuring blood pressure. Recommendations for blood pressure measurement in humans and The accuracy of these methods has not been validated, but they provide at least a general estimate of the systolic blood pressure. Accuracy of blood pressure measurement in the family practice BACKGROUND: Equipment, physiologic, and technique factors can influence the accuracy of blood pressure measurement. The current study was designed to Accuracy of a wrist blood pressure monitor Accuracy of a new wrist cuff oscillometric blood pressure device. Comparison with intra-arterial and mercury manometer. American Journal of Hypertension High blood pressure: Get the most out of home monitoring Take a repeat reading two to three minutes after the first one to check accuracy. If your monitor doesn't automatically log blood pressure readings or heart Blood Pressure Monitors - machines for home use. When you look at blood pressure machines, you should find they carry a ÁœCEÁ« to try and ensure that all blood pressure monitors are tested for accuracy. Self-measurement of blood pressure: accuracy, patient preparation OBJECTIVE: Self-measurement of blood pressure is commonly performed by those persons with hypertension and is advocated in many national hypertension Blood Pressure Monitors: advice on accurate blood pressure monitors They stock a wide range of blood pressure monitors including automatic digital machines validated for accuracy by the British Hypertension Society BHS. Home Monitoring of High Blood Pressure Ask that it be tested for accuracy and learn how it works, how to use it and what to do in case of high blood pressure. Also find out where aneroid and ABC of hypertension: Blood pressure measurement -- O'Brien et al Hence, in the past decade or so, much attention has been given to validating blood pressure measuring devices for accuracy independently of the sometimes |
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