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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Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Systolic blood pressure for most healthy adults falls between 90 and 120 millimeters of mercury (mm Hg). Normal diastolic blood pressure falls between 60 MedlinePlus: High Blood Pressure You can control high blood pressure through healthy lifestyle habits and taking medicines, if needed. National Heart, Lung, and Blood Institute. Start Here What Is High Blood Pressure? For example, blood pressure readings of 138/82, 128/89, or 130/86 are all in the prehypertension range. If your blood pressure is in the prehypertension How to Prevent High Blood Pressure Here's an excellent overview of high blood pressure and what you can do to prevent it. Related Web Site: Stay Healthy: Know Your Blood Pressure Numbers AllRefer Health - Blood Pressure (Diastolic Blood Pressure Blood Pressure (Diastolic Blood Pressure, Systolic Blood Pressure) information center covers description, preparation, risks, expectations, Blood Pressure - Heart and Stroke Foundation of Canada And thatâ™s important because you can actually lower your risk of a heart attack and stroke if you keep your blood pressure in a healthy range. Blood Pressure Rangem, Hypertension, Stage, Healthy BP - Guide4Living A healthy blood pressure range does tend to differ according to various factors including age, stress levels and daily activity. Blood pressure also varies High Blood Pressure (Hypertension) - Yahoo! Health If you fall into the prehypertension range (120â“139/80â“89 mm Hg), . Healthy adults with normal blood pressure (119/79 mm Hg or below) should have their What Is High Blood Pressure? Learn about various levels of blood pressure and how high blood pressure (hypertension) is defined. Healthy Hearts: Hypertension/High Blood Pressure - The Human Heart There is no "ideal" blood pressure reading. However, there is a range of "normal" blood pressure readings. Generally, a reading that is less than 120 over Blood pressure - Wikipedia, the free encyclopedia Taking blood pressure levels at home or work with a home blood pressure monitoring device may help determine a person's true range of arterial pressure |
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