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 Normal diastolic blood pressure falls between 60 and 80 mm Hg. Current guidelines define normal blood pressure as lower than 120/80. InteliHealth: Add more fruits, vegetables and low-fat dairy products to your plate. The second number refers to your diastolic blood pressure. Diastolic is the lowest High Blood Pressure: Things You Can Do to Help Lower Yours The second number is the diastolic blood pressure. A normal blood pressure is 120/80 or lower. High blood pressure is 140/90 or higher. Low blood pressure Many people were quite wrongly treated for low blood pressure in the UK in the pressure in your arteries falls and this is known as diastolic pressure. Using Diet to Lower Your Blood Pressure The American Heart Association Nutrition Committee estimates that even a small reduction of just two points in diastolic blood pressure could lower a High Blood Pressure: Heart and Blood Vessel Disorders: Merck In contrast, many older people with high blood pressure have high systolic pressure (140 mm Hg or more) with normal or low diastolic pressure (less than 90 Blood pressure - Wikipedia, the free encyclopedia The values of systolic and diastolic pressure are computed, not actually measured from the raw .. Blood pressure that is too low is known as hypotension. Arch Intern Med -- Abstract: Low diastolic blood pressure and BACKGROUND: A low diastolic blood pressure has been associated with increased cardiovascular risk. The following proposed mechanisms underlie this Blood Pressure Hypertension Systolic Diastolic For many years physicians have concentrated on treating hypertension or high blood pressure by trying to lower the diastolic pressure. Diastolic pressure is MedlinePlus Medical Encyclopedia: Blood pressure The bottom number is the diastolic blood pressure reading. your provider if your blood pressure measurements are consistently high or low or if you have Low blood pressure - hypotension Information about low blood pressure. Then it falls to a lower level, called the diastolic pressure, which it reaches just before each heartbeat. Low blood pressure (hypotension): Causes - MayoClinic.com Some experts define low blood pressure as readings lower than 90 systolic or 60 diastolic â” you need to have only one number in the low range for your blood The association between low diastolic blood pressure in middle age The association between low diastolic blood pressure in middle age and cognitive function in old age: a population-based study from Age and Ageing in Health Translating Blood Pressure Numbers What do blood pressure numbers indicate? The higher (systolic) number represents the pressure while the heart is beating. The lower (diastolic) number Diagnose-Me: About Diastolic Blood Pressure "Don't know". 2. "Under 70 (low)", Low diastolic blood pressure, A symptom. 3. "70 to 89 (normal)", Normal diastolic blood pressure, A symptom Systolic -- Not Diastolic -- Blood-Pressure Reading Should Define Traditionally, diastolic blood pressure, the second or lower number, was thought to be more important. Joseph Izzo, M.D., professor of medicine and Diastolic Blood Pressure Control: How Low Is Too Low? At what point in the treatment of ISH does the potential harm of low DBP outweigh the benefit of lowering SBP? Is the increased event rate associated with Low Diastolic Blood Pressure Blood pressure, Low diastolic pressure measures the pressure of the heart between resting of the beats. Low Blood Pressure Low blood pressure or hypotension refers to the fall in blood pressure below normal. Health Organisation as 140 mm / gh systolic and 90 mm/gh diastolic, |
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