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 This drop in blood pressure when you stand up is called postural hypotension. If you are well with no drop in blood pressure when standing then you Blood Pressure Drop During Bypass Surgery Associated With Patients whose mean arterial blood pressure drops during bypass surgery may be at risk for early difficulties in thinking, learning and memory, according to Sudden blood pressure drop in the elderly could be onset of If you are elderly and your blood pressure suddenly drops, you could be in the initial stages of Alzheimer's disease or some other form of dementia, Blood Pressure Drop May Cause Vision Loss - high blood pressure Blood Pressure Drop May Cause Vision Loss - high blood pressure medication can affect vision - Brief Article from USA Today (Society for the Advancement of Extreme Drop in Blood Pressure - Allergy - MedHelp Blood in semen pressurePressure ulcer became very sweaty and had pins and needles all over his body. Then he got really bad diarreah. Blood pressure drops with DMV ingredient Blood pressure drops with DMV ingredient A milk ingredient made by Dutch ingredients business DMV International can effectively reduce blood pressure in Low blood pressure - WebMD Chronic low blood pressure is almost never serious. But health problems occur when blood pressure drops suddenly, and the brain is deprived of an adequate HON - News : Blood Pressure Drop During Bypass Might Impair Thinking THURSDAY, June 14 (HealthDay News) -- Patients who experience a blood pressure drop during bypass surgery may be at increased risk for a short-term dip in Mayo Clinic - Mayo Clinic Finds Effective Remedy for Blood Mayo Clinic Finds Effective Remedy for Blood Pressure Drop When Standing Up. Tuesday, October 05, 2004. ROCHESTER, Minn. â” Mayo Clinic neurologists have Your High Blood Pressure Questions Answered â” Low Blood Pressure In some people, blood pressure drops rapidly when standing from a sitting or prone position, causing dizziness, lightheadedness, blurred vision and even Drug Reduces Severity Of Sudden Drops In Blood Pressure Title: Drug Reduces Severity Of Sudden Drops In Blood Pressure URL: http://www.pslgroup.com/dg/8FA32.htm Doctor's Guide July 21, 1998 Blood pressure - Wikipedia, the free encyclopedia For instance, with a subject in the supine position, blood travelling from the heart to the toes typically only experiences a 5 mmHg drop in mean pressure. Hypotension - Wikipedia, the free encyclopedia Neurocardiogenic syncope is a form of dysautonomia characterized by an inappropriate drop in blood pressure while in the upright position. Heart Health - Pressure Drop: Treating Orthostatic Hypotension Blood pressure has to be adequate to provide enough blood and therefore oxygen to reach the brain. Once it drops below a certain threshold, MedlinePlus: Low Blood Pressure Some people have low blood pressure all the time. They have no symptoms and their low readings are normal for them. In other people, blood pressure drops Orthostatic hypotension (postural hypotension) - MayoClinic.com Orthostatic hypotension â” also called postural hypotension â” is a form of low blood pressure that happens when you stand up from sitting or lying down. Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and However, others who normally have high blood pressure may develop symptoms of low blood pressure if their blood pressure drops to 100/60. |
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