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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White coat hypertension - changes in blood pressure levels Simply put, white coat hypertension means having a high reading only when your blood pressure is measured away from your normal home environment, Blood pressure levels influenced by time of day and year The odds of measuring an elevated blood pressure can vary by as much as 40 percent depending on the time of day and time of year, according to researchers Le Magazine, May 2005 - Report: Warning! Normal Blood Pressure May No oneâ™s blood pressure stays constant at the optimal level of 120/80 mmHg or lower. Blood pressure fluctuates widely, even in people with normal levels. Low blood pressure This is why when you have your blood pressure level assessed it is so Until recently, normal blood pressure was considered to be the average blood What is blood pressure? Learn what is considered a normal blood pressure reading. different categories, the higher category should be used to classify blood pressure level. Blood Pressure Chart - Normal Blood Pressure Range Normal blood pressure range chart, using a blood pressure monitor. Summary of human BP range, the Averages, and the Comments relating to each BP level. Measuring Blood Pressure, what the numbers mean. This is why when you have your blood pressure level assessed it is so find that your diastolic level is normal but your systolic level starts to rise Categories for Blood Pressure Levels in Adults: Guide to Lowering HBP Blood Pressure Level (mmHg). Category, Systolic, Diastolic. Normal, < 120, and, < 80. Prehypertension, 120-139, or, 80-89. High Blood Pressure What Is High Blood Pressure? If you are being treated for high blood pressure and have repeated readings in the normal range, you still have high blood pressure. There are two levels of What Is Normal Blood Pressure? Medical guidelines state that a normal blood pressure for most adults is drug treatment is recommended for a blood pressure level of 130/80 mm Hg or |
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