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 Hypotension usually means blood pressure that is lower than 90/60 mmHg (millimeters of mercury) or is low enough to cause symptoms. When the blood pressure Low blood pressure (hypotension) - MayoClinic.com So, it's easy to understand why you might assume the lower the better when it comes to blood pressure. And it's true that for some people â” those who Lower blood pressure and relieve stress naturally Lower blood pressure and relieve stress naturally using slow breathing with music. Low blood pressure In nearly all of these cases, blood pressure is much lower when you stand up, particularly if you stand up suddenly. This fall in blood pressure on standing Blood pressure (low) Introduction - Health encyclopaedia - NHS Direct For a young, healthy adult, normal blood pressure is about 110/70, but generally, the lower your blood pressure is, the better. Google Answers: How to Lower Blood Pressure without Drugs What are some effective things that people with high blood pressure have done to lower their blood pressure into a healthy range? Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Normal diastolic blood pressure falls between 60 and 80 mm Hg. Current guidelines define normal blood pressure as lower than 120/80. High Blood Pressure: Things You Can Do to Help Lower Yours Information about lowering your blood pressure from the American Academy of Family Physicians. Treatments: Guide to Lowing High Blood Pressure It is important to take steps to keep your blood pressure under control. The treatment goal is blood pressure below 140/90 and lower for people with other MedlinePlus: Low Blood Pressure If your blood pressure reading is 90/60 or lower, you have low blood pressure. Some people have low blood pressure all the time. They have no symptoms and Natural Remedies for High Blood Pressure The upper or first number in a blood pressure reading is the systolic pressure and the lower or second number is called the diastolic pressure. |
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