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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High blood pressure and children: Early treatment offers hope Normal, 89th percentile or lower, Your child's blood pressure is normal. Prehypertension, 90th percentile to 94th percentile, Your child's blood pressure is Pediatric Oncall-HIGH BLOOD PRESSURE IN CHILDREN A3) Normal blood pressure in children varies according to age, gender and height of a child. Q4) What are the causes of hypertension? High Blood Pressure (Hypertension) When a child has high blood pressure, the heart and arteries have a much heavier illness may be enough to get the blood pressure back to normal levels. Average Blood Pressure Levels On Rise Among American Children And Hypertension in youngsters is based on the range of blood pressures in healthy children. The new guidelines continue to define normal blood pressure as the High Blood Pressure in Children Some medicines can cause high blood pressure, but when they're discontinued, blood pressure usually returns to normal. A small number of children have MedlinePlus: High Blood Pressure 120/80 or lower is normal blood pressure; 140/90 or higher is high blood pressure . High Blood Pressure and Children: Early Treatment Offers Hope(Mayo Blood Pressure in Children - DrGreene.com The earlier these silent conditions are identified and addressed, the healthier your child (and future adult) will be. So, what's a normal blood pressure in Health: Toddlers & Preschoolers - iVillage What is a Normal Blood Pressure for Your Child? by Robert Steele, MD (see more from this What is the "optimal" blood pressure for a 5 year old child? Child Blood Pressure - DrGreene.com - caring for the next generation Taller children have higher normal blood pressures than shorter children of the same age. For an average 5 year old girl, a normal blood pressure would be Normal Blood Pressure Rate in Children - What is the normal blood Blood pressure is how hard the blood is flowing against the walls of blood vessels in the body. Blood Pressure Tables for Children and Adolescents, NHLBI The updated blood pressure (BP) tables for children and adolescents are based on the clinician with the BP level at the midpoint of the normal range. |
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