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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All about low blood pressure Blood pressure is determined by 3 main factors. Find out what causes low blood pressure and what you can do about it. Chocolate linked to low blood pressure - International Herald Tribune Eating dark chocolate may be almost as effective at lowering blood pressure as taking the most common anti-hypertensive drugs, a review of studies has found Hypotension - low blood pressure - Better Health Channel. Hypotension, or low blood pressure, means that the pressure of blood as it circulates around the body is lower than normal or lower than expected. Using EFT for High (or low) Blood Pressure EFT's results for blood pressure problems are often astonishing. This is true for both high blood pressure and low blood pressure. Low Blood Pressure Symptoms - What are the Symptoms of Low Blood Low blood pressure, also known as hypotension, has several clear and easily identified symtpoms. These include fainting, dizziness, and changes in mental Low Blood Pressure Information about low blood pressure and how to measure blood pressure properly with an accurate blood pressure monitor. Low blood pressure - hypotension Low blood pressure or hypotension is persistent abnormally low blood pressure. Blood pressure is the pressure of blood in your arteries. Low Blood Pressure - Symptoms, Treatment and Prevention Hypotension is the medical term for low blood pressure, generally considered to be a systolic blood pressure of 90 mm Hg or less in an adult. Introduction: Low Blood Pressure: Merck Manual Home Edition Very low blood pressure can be life-threatening because it can lead to shock (see Shock). Healthy people who have blood pressure that is low but still in Low Blood Pressure Answers to your questions about low blood pressure and more! Information you can trust: patient guides, the latest news, tips, tools, animations and Hypotension - Wikipedia, the free encyclopedia In physiology and medicine, hypotension refers to an abnormally low blood pressure. This is best understood as a physiologic state, rather than a disease. 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. Your High Blood Pressure Questions Answered â” Low Blood Pressure Is low blood pressure dangerous, and how low is too low? Find the answer here. Low Blood Pressure Within limits, the lower your blood pressure reading is, the better. In most people blood pressure isn't too low until it causes symptoms such as MedlinePlus: Low Blood Pressure Medline Health information looks at this disorder. An overview and in-depth look at the causes and treatments. Low blood pressure (hypotension) - MayoClinic.com Low blood pressure (hypotension) â” Comprehensive overview covers symptoms, causes and treatment of this condition. Low blood pressure At this time, it was thought that low blood pressure was a major cause of depression and tiredness. Many people were quite wrongly treated for low blood 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 Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Learn about low blood pressure (hypotension) is blood pressure below normal. Low blood pressure symptoms may include: lightheadedness, dizziness, |
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