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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Systolic -- Not Diastolic -- Blood-Pressure Reading Should Define Systolic blood pressure represents the maximum force exerted by the heart against the blood vessels during the heart's pumping phase. Diastolic pressure is Blood pressure Alternative Names. Diastolic blood pressure; Systolic blood pressure Top number is consistently 160 or over or the bottom number reads 100 or over Systolic Better than Diastolic or Pulse Blood Pressure as Increased diastolic pressure over 80 mm Hg was also associated with an âœSystolic Blood Pressure, Diastolic Blood Pressure, and Pulse Pressure: An HIGH BLOOD PRESSURE SYSTOLIC/DIASTOLIC 8025. Systolic or Diastolic Blood Pressure. Gabe Mirkin, M.D. Anyone with blood pressure over 120/80 should be on the DASH Diet. Diastolic blood pressure - definition of Diastolic blood pressure n the rating system for blood pressure levels in millimeters of mercury (mm Hg), given as the systolic over the diastolic pressure. Both the systolic and Health Information Diastolic blood pressure; Systolic blood pressure Stage 2 high blood pressure: systolic pressure consistently 160 or over, or diastolic 100 or over News - Systolic Better Than Diastolic Or Pulse Blood Pressure As Doctors consider a systolic blood pressure greater than 120 mm Hg (millimeters of Increased diastolic pressure over 80 mm Hg was also associated with an National High Blood Pressure Education Month Blood pressure is typically recorded as two numbers â” the systolic pressure (as the heart beats) over the diastolic pressure (as the heart relaxes between MedlinePlus Medical Encyclopedia: Blood pressure Diastolic blood pressure; Systolic blood pressure Top number is consistently 160 or over or the bottom number reads 100 or over. Low blood pressure Blood pressure - Wikipedia, the free encyclopedia The cuff is inflated to a pressure initially in excess of the systolic arterial pressure, and then reduces to below diastolic pressure over a period of Translating Blood Pressure Numbers Blood pressure of less than 140 over 90 is considered a normal reading for adults. A systolic pressure of 130 to 139 or a diastolic pressure of 85 to 89 |
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