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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What is blood pressure? That level should be lower than 120/80. When the level stays high, 140/90 or higher, you have high blood pressure. With high blood pressure, the heart works What Is Normal Blood Pressure? Medical guidelines state that a normal blood pressure for most adults is less than 120/80 mm Hg. Drug treatment is recommended if your blood pressure is at How Is Blood Pressure Measured? For example, if your blood pressure is 120/80 mm Hg, the top number of 120 is your systolic measurement. The bottom number of 80 is your diastolic What Is High Blood Pressure? If your blood pressure is 120/80, you say that it is "120 over 80." A blood pressure reading below 120/80 mmHg is considered normal. What Is Blood Pressure? Guide to Lowering HBP For example, a blood pressure measurement of 120/80 mmHg (millimeters of Normal blood pressure is less than 120 mmHg systolic and less than 80 mmHg High Blood Pressure - What it means and what you can do about it The systolic pressure is always stated first. For example, a blood pressure reading of 120 over 80 (120/80) would mean that your systolic pressure is 122 mm US guidelines say blood pressure of 120/80 mm Hg is not "normal One physician said he used to tell patients their blood pressure was normal at 120/80 mm Hg and send them home happy. Now, was he supposed to tell them they Hypertension (High Blood Pressure) Blood pressure is measured in millimeters of mercury (written as mm Hg). For example, normal blood pressure in adults should be less than 120/80 mm Hg. The 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'. Adult Health Advisor 2005.4: Blood Pressure For example, in the blood pressure reading of 120/80, 120 is the systolic pressure (the pumping pressure) and 80 is the diastolic pressure (the resting Hypertension - Wikipedia, the free encyclopedia The Mayo Clinic website specifies blood pressure is "normal if it's below 120/80" but that "some data indicate that 115/75 mm Hg should be the gold standard |
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