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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hypotension (low blood pressure) Hypotension is abnormally low blood pressure. Normal blood pressure is a reading of less than 120/80 mmHg (mmHg = millimeters of mercury, Hypotension concerns Low blood pressure (hypotension) tends only to be a problem if it causes symptoms such as fainting, lightheadedness and fatigue, or if it relates to an Hypertension: Low Cholesterol, High Blood Pressure. Hi James, This may be the result of activity induced hypertension. This has been shown to be what is called an anginal equivalent . That is to say, 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 All about low blood pressure Medications that may be associated with low blood pressure Hypotension may also be caused by certain medications, such as antidepressants, diuretics and Hypotension, Home, Low Blood Pressure, Treatments for low blood Heart Infocenter. Hypotension, Low Blood Pressure, Treatments for low blood pressure, Treatments for hypotension. 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. Blood Pressure, Low: Hypotension Medline Health information looks at this disorder. An overview and in-depth look at the causes and treatments. Blood pressure (low) Introduction - Health encyclopaedia - NHS Direct Low blood pressure is also known as hypotension. People with a reading of around 90/60, or less, are commonly regarded as having low blood pressure. Introduction: Low Blood Pressure: Merck Manual Home Edition Low blood pressure (hypotension) is blood pressure low enough to cause symptoms such as dizziness and fainting. Various drugs and disorders can cause the 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. 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) In most people low blood pressure isn't cause for concern unless it results in symptoms such as lightheadedness or fainting. 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. 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 Low blood pressure (hypotension): Causes - MayoClinic.com Low blood pressure (hypotension) â” Comprehensive overview covers symptoms, causes and treatment of this condition. 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 Low blood pressure (hypotension) - MayoClinic.com Low blood pressure, also called hypotension, would seem to be something to strive for. After all, high blood pressure (hypertension) is a well-known risk 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, |
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