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 - WrongDiagnosis.com List of 337 disease causes of Low blood pressure, patient stories, diagnostic guides, on posture changes; Orthostatic intolerance low blood pressure Hypertension (High Blood Pressure) Blood pressure changes from minute to minute and is affected not only by activity and rest, but also by temperature, diet, emotional state, posture, THE EFFECT OF POSTURE ON THE BLOOD PRESSURE OF PREGNANT WOMEN WITH presented which shows that the blood pressure in hypertensive pregnant. patients is lowest in the left lateral recumbent posture. INTRODUCTION Association between the blood pressure response to a change in Association between the blood pressure response to a change in posture and the 6-year incidence of hypertension: prospective findings from the ARIC study Effect of Posture on Blood and Intraocular Pressures in Multiple Kothe A. The effect of posture on intraocular pressure and pulsatile ocular blood flow in normal and glaucomatous eyes. Surv Ophthalmol. Bad posture could raise your blood pressure - 11 August 2007 - New Scientists have found a direct link between the neck muscles and an area of the brainstem that controls heart rate and blood pressure. Yoga Journal - Yoga Expert Q&A - High Blood Pressure and Inversions First, let me explain how inversions affect blood pressure. In an inverted posture, gravity causes pressure to increase inside the blood vessels (arteries, Association between the blood pressure response to a change in Both blood pressure increases and decreases in response to a change in posture have been associated cross-sectionally with higher blood pressure and a ABC of hypertension: Blood pressure measurement -- Beevers et al Variability of blood pressure "White coat" hypertension Posture of subject . Posture affects blood pressure, with a general tendency for it to increase ABC of hypertension: Blood pressure measurement Posture affects blood pressure, with a general tendency for it to increase from the lying to the sitting or standing position. |
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