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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Childrens Hospital Emergency Transport Team- Pediatric Team Pediatric Neuropsychology · Pediatric Orthopaedic Surgery A range of blood pressure values is given based on how old and how tall your adolescent is. High Blood Pressure logo for Pediatric Services Normal Range of Resting Values Blood Pressure Back to Top. Pediatric Services Staff Resources Home Page NIH Clinical Center: Pediatric Services: Age-Appropriate Vital Signs This page contains links to blood pressure tables for girls and boys according to weight. Pediatric Services Staff Resources Home Page NIH Clinical Center: Pediatric Services The 50th, 90th, 95th, and 99th percentiles for systolic blood pressure (SBP) and the clinician with the BP level at the midpoint of the normal range. Blood Pressure Tables for Children and Adolescents, NHLBI Neonatal/Pediatric Deltran^ IV Blood Pressure Transducers a1% of reading or a1 mmHg, whichever is greater in the range of -50 to 200 mmHg. Neonatal/Pediatric Blood Pressure Transducers and Needleless Blood Hypertension in children, its causes and treatment at www.pediatriconcall.com. Pediatric Oncall-HIGH BLOOD PRESSURE IN CHILDREN Diastolic BP = Bottom number in blood pressure. Typical Vital Signs in the Pediatric Population. Normal vital signs of infants and children are different Autosomal Dominant Polycystic Kidney Disease Guidelines for Journal of Pediatrics 1993; 123:871. Blake, KV, Gurrin, LC, Evans, SF, et al. Reference ranges for blood pressure in preschool Australians, Diagnosing High Blood Pressure in Children - Pediatric One year after recommending that children should be checked for high blood pressure starting at age 3, medical experts reviewed additional supporting |
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