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 or Hypotension Symptoms, Cure, Cause, Treatment Low blood pressure is an abnormal condition where a person's blood pressure (the pressure of the blood against the walls of the blood vessels during and hypotension, or low blood pressure (pathology) -- Britannica condition in which the blood pressure is abnormally low, either because of reduced blood volume or because of increased blood-vessel capacity. Low Blood Pressure: Hypotension Low blood pressure is a term for blood pressure that is abnormally or dangerously Some people always have a blood pressure that is low compared to other Low Blood Pressure and Chronic Fatigue - What causes low blood I get concerned when patients say they feel okay, but their blood pressure is abnormally low -- for them. This could be a sign of impending trouble from Low blood-pressure - Hutchinson encyclopedia article about Low In medicine, abnormally low blood pressure. Postural hypotension refers to the sudden fall in blood pressure that can occur on standing up suddenly. Low Blood Pressure Home Remedy Low blood pressure (hypotension) is the pressure of the blood in the arteries. It occurs when the pressure of the blood is abnormally low. Causes & Remedies for Low Blood Pressure While hypertension or high blood pressure may lead to a stroke or a heart disease, hypotension, or abnormally low blood pressure, it can potentially lead to Abnormal Blood Pressure - Blood Pressure Too High - Blood Pressure The first thing you should do when your blood pressure monitor gives you an abnormally high or abnormally low reading is to take your blood pressure again. Hypotension@Everything2.com Hypotension is the state of having abnormally low blood pressure. (Below about 90/60 mmHg or lower for particularly athletic patients. Blood pressure: information about, high blood pressure, symptoms Abnormally high blood pressure (hypertension) is considered a contributory cause of arteriosclerosis. Abnormally low blood pressure (hypotension) is Living With Low Blood Pressure on Yahoo! Health Combining other drugs with medications prescribed for high blood pressure or blood pressure medications themselves can sometimes cause abnormally low blood 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. 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, Your High Blood Pressure Questions Answered ┠Low Blood Pressure Among the heart conditions that can lead to low blood pressure are an abnormally low heart rate (bradycardia), problems with heart valves, heart attack and Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Learn about low blood pressure (hypotension) is blood pressure below normal. an abnormal heart rhythm or symptoms possibly caused by low blood pressure. Low Blood Pressure Glossary of Terms with Definitions on Low Blood Pressure glossary includes a list of Low Blood Pressure related medical definitions and In acidosis, the pH of the blood is abnormally low. Diseases and Conditions Encyclopedia : Discovery Health Low blood pressure is a term for blood pressure that is abnormally low. What is going on in the body? Blood pressure is expressed in millimeters of mercury, 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. All about low blood pressure Specific diseases that may be associated with low blood pressure Abnormally low blood pressure may be associated with a number of different causes, such as: |
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