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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Wide Blood Pressure Variation Between Arms Objectives: To investigate whether there are inter-arm blood pressure differences that are of clinical importance to general practice. A study of inter-arm blood pressure differences in primary care Left-arm and right-arm (interarm) blood pressure differences are common. Blood pressure may be slightly higher in your dominant arm. The normal range for inter-arm differences in blood pressure Inter-arm differences in blood pressure: when are they clinically significant? Cassidy P, Jones K. A study of inter-arm blood pressure differences in News - Significant Blood Pressure Differences Between Arms May RESULTS: inter-arm systolic and diastolic blood pressure differences show a near normal distribution of values. Some individuals had clinically important The normal range for inter-arm differences in blood pressure Significant blood pressure differences between the right and left arms of patients may indicate an i. The Normal Difference in Bilateral Indirect Blood Pressure The normal range for inter-arm differences in blood pressure - Statistical Data Included from Age and Ageing in Health provided free by Find Articles. Is there a difference in blood pressure in each arm? --The Doctors A clinically significant difference was chosen as a systolic blood pressure The coefficient of variation in obtaining the blood pressure in each arm was Difference in blood pressure between arms might reflect peripheral Why the difference in each arm. I take it various times a day while sitting down. I know my BP monitor is accurate. Do I have high blood pressure? which arm Blood pressure: Higher in one arm? - MayoClinic.com The importance of a difference is already recognised between the arm and the leg and left arm blood pressure discrepancies in vascular surgery patients. Blood pressure - Wikipedia, the free encyclopedia A small difference in blood pressure readings between your arms is generally not a health concern. Sometimes blood pressure is higher in your dominant arm. |
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