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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How to Check Blood Pressure | eHow.com How to Check Blood Pressure. Blood pressure machines are popular right now. But taking your pressure manually with a simple cuff and stethoscope will render High blood pressure (hypertension) - MayoClinic.com HIGH BLOOD PRESSURE · More Information. Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. Measuring blood pressure - accurate readings with home blood When you first start measuring your blood pressure at home, you will probably check it twice a day, morning and evening. This may go down to once a day and Medindia.net - Blood Pressure charts This measurement is important if you are using a home electronic device to check your blood pressure. Please remember to put on the cuff properly and if MedlinePlus Medical Encyclopedia: Blood pressure Blood pressure check · Blood pressure check The bottom number is the diastolic blood pressure reading. It represents the pressure in the arteries when Check Blood Pressure in Both Arms Identification of systolic blood pressure by palpatory method helps one to avoid a lower systolic reading by auscultatory method if there is an auscultatory High Blood Pressure Health Risk Calculator Enter your blood pressure numbers to understand your health risks and more. Blood Pressure Testing and Measurement Your doctor or another qualified health professional should check it at least once every two years and more often if it's high. Blood pressure is measured Blood Pressure Monitoring at Home -- familydoctor.org Listen carefully for the first sound. Check the blood pressure reading by looking at the pointer on the dial. This number will be your systolic pressure. Home Blood Pressure Test A home blood pressure test allows you to keep track of your blood pressure at home. Blood pressure is a measure of the force of blood inside an artery. How To Check Your Blood Pressure Learn how blood pressure is taken and how often to have it checked. |
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