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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High blood pressure (hypertension) The systolic pressure is always listed first, then the diastolic pressure. A typical normal blood pressure reading would be 120/80 mmHg. Low blood pressure (hypotension): Causes - MayoClinic.com Current guidelines identify normal blood pressure as lower than 120/80 â” many experts think 115/75 is optimal. Higher readings indicate increasingly serious Blood Pressure Chart - Normal Blood Pressure Range What is Normal Blood Pressure? Buy and use a blood pressure monitor. Compare your BP reading with the numbers on the chart above. Measuring Blood Pressure, what the numbers mean. If your blood pressure is on the high side of 'normal' (between 130/85 and 139/89 mmHg) or if you have had a previous high reading at anytime before, What Is High Blood Pressure? A blood pressure reading below 120/80 mmHg is considered normal. In general, lower is better. However, very low blood pressure can sometimes be a cause for Blood pressure normal? Maybe now it isnâ™t. What was classified as normal or high-normal blood pressure (a systolic pressure You don't want to put off doing something until your reading is 140/90, Blood pressure - Wikipedia, the free encyclopedia 1.2 Invasive measurement; 1.3 Home monitoring; 1.4 Taking accurate home blood pressure readings. 2 Normal Values; 3 Physiology. 3.1 Regulation Blood pressure: A chart explaining your blood pressure reading Blood pressure readings fall into four general categories, ranging from normal to stage 2 hypertension (high blood pressure). The level of your blood High Blood Pressure (Hypertension) - Texas Heart Institute Heart Those with a blood pressure reading anywhere from 120/80 up to 139/89 (once thought to be normal) are now classified within a category called Blood Pressure Guide Have you checked your blood pressure reading? Any distortion of your normal blood pressure levels could be fatal for youâ¦Get your BP checked today! What Is Normal Blood Pressure? (mm Hg), Blood Pressure Reading (mm Hg). Normal**, below 120, and, below 80, below 120/80. Pre-hypertension, 120-139, or, 80-89, 120/80 - 139/89 |
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