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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Causes and remedies for high blood pressure - FamilyEducation.com In 2003, the definition of ÁœnormalÁ« blood pressure (which had been 120/80) changed. Experts now recommend a systolic (that's the upper number) reading of Hypertension - Definition, Description, Causes, Symptoms True hypertension exists only when a person has high blood pressure readings on a number of different occasions. If a doctor suspects hypertension, 2.3 Definition and interpretation of used indicators The numerator for the prevalence was the number of respondents with MSBP > 140 or MDBP > 90 or DRUGS = 1. Proportion of population with blood pressure ASH Panel Proposes New Hypertension Definition -- Goldfarb 2 (7 "Hypertension is more complicated than just blood pressure," says Thomas D. Giles, for what hypertension really is, rather than just treating a number. 'Prescribing by Numbers: Drugs and the Definition of Disease 'Prescribing by Numbers: Drugs and the Definition of Disease' Dohme switching strategies when researchers discovered it also lowered blood pressure. ScienceDirect - The Lancet : Measures and meaning of blood pressure Measures and meaning of blood pressure. Michael H Aldermana Thiss latter concept is sometimes expressed as number needed to treat to prevent one event. Definition of Hypertension Could Change Again Doctors have proposed a new definition of hypertension, taking the emphasis away from the blood pressure numbers and placing it on a person's overall risk Blood Pressure - What is Blood Pressure - Blood Pressure Definition When blood pressure is measured, we commonly record the pressure as two numbers, one above the other - like a fraction. The difference between a fraction ASH group proposes new definition of hypertension There has in the past been a heavy reliance on blood-pressure numbers, Giles said; even clinical trials in the past were organized based entirely on cut Prescribing by Numbers: Drugs and the Definition of Disease Jeremy A. Greene, Prescribing by Numbers: Drugs and the Definition of Disease At that time, high blood pressure was being seen increasingly as a disease Blood pressure definition - Medical Dictionary definitions of It's measurement is recorded by two numbers. High Blood Pressure - High Blood Pressure: Medical information about hypertension, its treatment, Newswise Medical News | Medical Experts ReDefine Hypertension The group has expanded the definition of hypertension beyond the numbers obtained from a blood pressure reading, and instead, urge that blood pressure be Definition of High Blood Pressure - What is Hypertension - High Blood pressure is measured using a blood pressure gauge. The measurement produces two numbers: an upper (systolic) blood pressure and a lower (diastolic) High blood pressure (hypertension) Blood pressure is measured using two numbers. An example of this could be 'the blood pressure is 120 over 80', which is written as '120/80mmHg'. high blood pressure: Definition and Much More from Answers.com What does 140 over 90 mean? Learn about high blood pressure numbers. Meaning #1: a common disorder in which blood pressure remains abnormally high (a Understanding LAb Tests to Reverse and Prevent Heart Disease Understanding the Meaning of Laboratory Tests . Blood Pressure is measured in two numbers. The higher number, called systolic, shows the highest amount What Is High Blood Pressure? Blood pressure is always given as these two numbers, the systolic and diastolic pressures. Both are important. Usually they are written one above or before MedlinePlus Medical Encyclopedia: Blood pressure The bottom number is the diastolic blood pressure reading. Pre-high blood pressure:. Top number is consistently 120 to 139 or the bottom number reads 80 What Is The Meaning Of The Numbers In A Blood Pressure Reading What Is The Meaning Of The Numbers In A Blood Pressure Reading? - Science Fact Finder. |
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