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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Blood Pressure Blood pressure below 120 over 80 mmHg (millimeters of mercury) is considered optimal for adults. A systolic pressure of 120 to 139 mmHg or a diastolic HIGH BLOOD PRESSURE SYSTOLIC/DIASTOLIC Historic perspectives on the relative contributions of diastolic and systolic blood pressure elevation to cardiovascular risk profile. 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 Measuring Blood Pressure, what the numbers mean. In a single day your blood pressure may vary by 30 to 40 mmHg systolic with similar proportionate changes in diastolic pressure. Blood Pressure Hypertension Systolic Diastolic Information about a study that finds blood pressure numbers too high for many. What Are High Blood Pressure and Prehypertension? It is shown as the top number in a blood pressure reading. High blood pressure is 140 and higher for systolic pressure. Diastolic pressure does not need to Blood pressure Diastolic blood pressure; Systolic blood pressure. How the test is performed:. Blood pressure is usually measured while you are seated with your arm resting The Diastolic Blood Pressure in Systolic Hypertension The Diastolic Blood Pressure in Systolic Hypertension. Harold Smulyan, MD, and Michel E. Safar, MD. Because antihypertensive therapy is effective in elderly Hypertension Online Slides - systolic blood pressure, hypertension The Relationship of Systolic and Diastolic Blood Pressure to Cardiovascular Disease Risk: Observational Data Systolic blood pressure -- Basile 325 (7370): 917 -- BMJ Elevation of systolic blood pressure predicts the risk of cardiovascular disease better than increases in diastolic blood pressure.1 Although this was Re: Regarding Diastolic and Systolic blood pressure Admin note: Systolic blood pressure is the (maximal) pressure within the cardiovascular system as the heart pumps blood into the arteries. Diastolic National High Blood Pressure Education Month It is the most common form of high blood pressure for older Americans. For most Americans, systolic blood pressure increases with age, while diastolic Uncontrolled Hypertension, Systolic and Diastolic Blood Pressure Title: Uncontrolled Hypertension, Systolic and Diastolic Blood Pressure and Development of Symptomatic Peripheral Arterial Disease in the Women's Health 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 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). Translating Blood Pressure Numbers Normal blood pressure is thus usually said to be 120/80 (systolic/diastolic) or less, measured in millimeters of mercury (abbreviated as mm Hg). MedlinePlus Medical Encyclopedia: Blood pressure Diastolic blood pressure; Systolic blood pressure. Definition Return to top. Blood pressure is a measurement of the force applied to the walls of the Systolic and diastolic blood pressure Systolic blood pressure refers to the pressure of blood in the artery when the heart contracts. It is What is blood pressure? Blood pressure is always given as these two numbers, the systolic and diastolic pressures. Both are important. Usually they are written one above or before |
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