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 suddenly risky for some - Heart health- msnbc.com Patients with heart failure who also have low blood pressure ┠usually taken as a at the time of hospital admission had substantially lower death rates, Low Blood Pressure is not an Independent Determinant of Survival Alternatively, the low blood pressure may. decrease cardiac and cerebral perfusion and contribute. to death in its own right. Relation of low diastolic blood pressure to coronary heart disease Relation of low diastolic blood pressure to coronary heart disease death in presence of myocardial infarction: the Framingham Study. Arch Intern Med -- Abstract: Serum cholesterol, blood pressure Serum cholesterol, blood pressure, cigarette smoking, and death from coronary . High Triglycerides and Low HDL Cholesterol and Blood Pressure and Risk of Blood Pressure Variability Increases Risk For Stroke Death Blood Pressure Variability Increases Risk For Stroke Death Space Shuttle "Low Pressure" Pants Inspire New Diagnostic Tool For Determining Stroke Risk Low blood pressure can point to heart failure death » Propeller Low blood pressure can point to heart failure death. Health & Fitness ⓠPatients with heart failure who also have low blood pressure -- usually taken as a Blood Pressure Variability Increases Risk For Stroke Death In an earlier study, also published in Neurology, the research team had shown that a low initial blood pressure in stroke patients upon arrival in the TREATING HIGH BLOOD PRESSURE: HOW LOW IS TOO LOW? © Priory Lodge Further analysis of the causes of death revealed that the increased mortality at low blood pressure levels was due to existing cardiac and other diseases Low blood pressure (hypotension) - CNN.com Many people who have low blood pressure (hypotension) are healthy and have no signs . If untreated, severe hypovolemic shock can cause death within a few Relationship between Blood Pressure and Death among Treated They then calculated the risk for death in groups of patients with low, medium, and high blood pressure while they were receiving medication. Low blood pressure (hypotension): Causes - MayoClinic.com If untreated, severe hypovolemic shock can cause death within a few minutes or Doctors often break down low blood pressure (hypotension) into different |
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