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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Hypotension - low blood pressure - Better Health Channel. Hypotension, or low blood pressure, means that the pressure of blood circulating around the body is lower than normal or lower than expected given the Living With Low Blood Pressure on Yahoo! Health If you are in good health and have no symptoms related to your low blood pressure, don't worry about it. What Is High Blood Pressure? U.S. Department of Health & Human Services * National Institutes of Health However, very low blood pressure can sometimes be a cause for concern and MayoClinic.com Health Library - Low blood pressure (hypotension) High blood pressure's neglected sibling, low blood pressure (hypotension) can be both a sign of good health and a life-threatening condition. Low salt diet and health - low sodium food healthy diet The amount of salt - sodium chloride - that we eat has a direct effect on our health and blood pressure. The more salt we eat the higher our blood pressure. Adult Health Advisor 2005.4: High Blood Pressure: Low-Sodium Diet Many people with high blood pressure find that cutting down on sodium lowers their blood pressure. A low-sodium diet limits the amount of sodium in your University of Illinois Medical Center:Health Library Low blood pressure is a term for blood pressure that is abnormally low. They may not have any symptoms from their low blood pressure because it is MedlinePlus: Low Blood Pressure National Institutes of Health. The primary NIH organization for research on Low Blood Pressure is the National Heart, Lung, and Blood Institute Low Blood Pressure Individuals with low blood pressure may sometimes develop non- specific It is widely accepted that high blood pressure is a major health problem and is Low blood pressure - WebMD Learn about low blood pressure, also known as hypotension. Low blood pressure can be a sign of good health -- but in the elderly, it can be a sign of lifeclinic.com - Low Blood Pressure In many countries low blood pressure is regarded as a sign of excellent health, and it is certainly true that it is associated with a good outlook from the Blood Pressure: Low: Health Topics: University of Iowa Health Care Low blood pressure can either be a sign of good health or a warning signal to a health problem. People with high fitness levels tend to have lower blood Low blood pressure suddenly risky for some - Heart health- msnbc.com Patients with heart failure who also have low blood pressure â” usually taken as a good sign â” may in fact have a higher risk of dying, US researchers Blood pressure (low) Introduction - Health encyclopaedia - NHS Direct Low blood pressure is also known as hypotension. People with a reading of around 90/60, or less, are commonly regarded as having low blood pressure. Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Learn about low blood pressure (hypotension) is blood pressure below normal MedicineNet provides reliable doctor produced health and medical information Low blood pressure (hypotension): Causes - MayoClinic.com Doctors often break down low blood pressure (hypotension) into different categories, depending on the . Get your free trial issue of Health Letter now! Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Learn about low blood pressure (hypotension) is blood pressure below normal. Is low blood pressure bad for your health? What are low blood pressure Low blood pressure (hypotension) - MayoClinic.com And it's true that for some people â” those who exercise and are in top physical condition â” low blood pressure is a sign of health and fitness. |
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