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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diastolic blood pressure (physiology) -- Britannica Online Chronic hypertension is defined as a systolic blood pressure of 140 millimetres of mercury (mm Hg) or higher and a diastolic blood pressure of 90 mm Hg or Faculty of 1000 Medicine | Diastolic blood pressure and mortality This observational study confirms that a very low diastolic blood pressure carries an increased risk of death in the elderly patients. Diastolic Blood Pressure - Diastolic Hypertension - Types of High Diastolic blood pressure is the bottom number in a blood pressure measurement. Medindia.net - Blood Pressure charts Mild Hypertension: The systollic blood pressure ranges between 140 and 160 and the diastolic blood pressure ranges between 90 and 100. Cadernos de Saúde Pública - Association between diastolic blood Abstract Diastolic blood pressure was viewed as a generic indicator of aging, The study of the association between diastolic blood pressure and What is diastolic pressure? Find the definition for diastolic the intracardiac pressure during or resulting from diastolic relaxation of a cardiac chamber; the lowest arterial blood pressure reached during any given What Are High Blood Pressure and Prehypertension? Diastolic pressure does not need to be high for you to have high blood pressure. The higher the diastolic blood pressure the greater the risk for heart The Diastolic Blood Pressure in Systolic Hypertension diastolic blood pressure due to decreased aortic distensibility. 2. Increased pulse wave velocity (PWV) as a result of decreased aortic distensibility. 3. High Blood Pressure (Hypertension) - Patient UK For example, it is estimated that reducing a high diastolic blood pressure by 6 mmHg reduces your relative risk of having a stroke in the future by about High blood pressure (hypertension) The second figure is the diastolic blood pressure. This is the minimum pressure in the arteries between beats when the heart relaxes to fill with blood. Blood pressure measurement Both the systolic and diastolic pressure measurements are important - if either one is raised, it means you have high blood pressure (hypertension). Definition: diastolic blood pressure from Online Medical Dictionary diastolic blood pressure. The pressure exerted on the walls of the arteries when the heart is in the relaxation phase (diastole). Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and By convention, an individual's blood pressure is expressed as systolic/diastolic blood pressure, for example, 120/80.The systolic blood pressure (the top High blood pressure (hypertension) - causes, treatments and An elevation of the systolic and/or diastolic blood pressure increases the risk of developing heart (cardiac) disease, kidney (renal) disease, hardening of How To Lower Diastolic Blood Pressure, Safely? One of the most important numbers in determining blood pressure reading is the diastolic blood pressure. The diastolic blood pressure is the number at the Systolic -- Not Diastolic -- Blood-Pressure Reading Should Define Systolic blood pressure, the first -- or higher -- number in a blood-pressure reading, is the important factor in determining whether a person has Blood pressure - Wikipedia, the free encyclopedia When blood flow is nil (cuff pressure exceeding systolic pressure) or unimpeded (cuff pressure below diastolic pressure), cuff pressure will be essentially What is blood pressure? Note: When systolic and diastolic blood pressures fall into different categories, the higher category should be used to classify blood pressure level. MedlinePlus Medical Encyclopedia: Blood pressure The bottom number is the diastolic blood pressure reading. It represents the pressure in the arteries when the heart is at rest. |
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