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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Orthostatic Hypotension Orthostasis means upright posture, and hypotension means low blood pressure. Thus, orthostatic hypotension consists of symptoms of dizziness, faintness or Hypotension definition - High Blood Pressure (Hypertension) and Neurologic conditions that can lead to low blood pressure include changing position from lying to more vertical (postural hypotension), stroke, shock, High Pulse Low Blood Pressure, Neurally Mediated Hypotension Neurally Mediated Hypotension is a condition that affects how your body regulates blood pressure. One of the first signs is high pulse low blood pressure. Blood Pressure Treatment: High blood pressure (hypertension When this happens the body may not get a sufficient supply of blood. This is called low blood pressure (hypotension) and is characterized by lack of sleep, A tilt table test reveals low blood pressure (neurally mediated Hypotension is the formal medical term for low blood pressure, and syncope is the Low blood pressure (neurally mediated hypotension) is common in many Hypotension, Home, Low Blood Pressure, Treatments for low blood Heart Infocenter. Hypotension, Low Blood Pressure, Treatments for low blood pressure, Treatments for hypotension. Low blood pressure - hypotension Low blood pressure or hypotension is persistent abnormally low blood pressure. Blood pressure is the pressure of blood in your arteries. Blood Pressure Health Center Blood pressure is the force of the blood against the artery walls. High blood pressure (hypertension) and low blood pressure (hypotension) can both cause MayoClinic.com Health Library - Low blood pressure (hypotension) High blood pressure's neglected sibling, low blood pressure (hypotension) can be both a sign of good health and a life-threatening condition. Postprandial Hypotension: Low Blood Pressure: Merck Manual Home If an older person experiences these symptoms after eating, doctors measure blood pressure before and after meals to determine if postprandial hypotension Orthostatic Hypotension in Women: Low Blood Pressure Low blood pressure can be a symptom of heart or circulatory problems. Rarely, there are neurological problems that underlie orthostatic hypotension. Low Blood Pressure or Hypotension Symptoms, Cure, Cause, Treatment Low Blood Pressure or Hypotension Infomation on Signs, Symptoms, Cause & Treatment. How it is diagnosed? Natural Cure, Alternative Medicine & Homeopathic Hypotension - low blood pressure - Better Health Channel. Hypotension, or low blood pressure, means that the pressure of blood as it circulates around the body is lower than normal or lower than expected. Low Blood Pressure (hypotension) In most people low blood pressure isn't cause for concern unless it results in symptoms such as lightheadedness or fainting. Low blood pressure - WebMD Learn about low blood pressure, also known as hypotension. Low blood pressure Hypotension is the medical term for low blood pressure (less than 90/60). Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Learn about low blood pressure (hypotension) is blood pressure below normal. Low blood pressure symptoms may include: lightheadedness, dizziness, Low blood pressure (hypotension) - MayoClinic.com Low blood pressure (hypotension) â” Comprehensive overview covers symptoms, causes and treatment of this condition. Hypotension - Wikipedia, the free encyclopedia In physiology and medicine, hypotension refers to an abnormally low blood pressure. This is best understood as a physiologic state, rather than a disease. Blood Pressure, Low: Hypotension Medline Health information looks at this disorder. An overview and in-depth look at the causes and treatments. |
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