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 At this time, it was thought that low blood pressure was a major cause of depression and tiredness. Many people were quite wrongly treated for low blood Weight and blood pressure - overweight and health problems Being overweight commonly leads to increased blood pressure as well as to many Symptoms like back pain, tiredness and breathlessness are also caused or MedlinePlus Medical Encyclopedia: High blood pressure (Hypertension) Hypertension is the term doctors use for high blood pressure. Chest pain; Confusion; Excessive tiredness; Nausea and vomiting; Severe headache Low Blood Pressure Individuals with low blood pressure may sometimes develop non- specific symptoms of tiredness, sleep disturbances, giddiness, black-outs, fainting, Low Blood Pressure Is low blood pressure associated with tiredness or depression? Many years ago it was thought that blood pressures below a systolic of 90 mmHg could lead to Hypertension / High Blood Pressure Symptoms, Cure, Cause These may be a sign of dangerously high blood pressure (called malignant hypertension) or a complication from high blood pressure. - tiredness - confusion High Blood Pressure - HBP Medication and Tiredness Latest News and Information On High Blood Pressure. Symptoms, risks, treatments and other information on High Blood Pressure. Head Pressure, Tiredness and eye/nose burning sensation >> Medical Constant spaciness, head pressure, now nausea â“ Need help · Sinus pressure, tiredness, puffy eyes · low blood pressure, weight loss and inablitlity to focus Blood pressure symptoms and Tiredness - Multiple Symptom Checker List of 406 causes for Blood pressure symptoms and Tiredness, alternative diagnoses, rare causes, misdiagnoses, patient stories, and much more. Re: lexapro - tiredness?--ocd! She chose to get on high blood pressure meds, plus take a pain reliever for lexapro - tiredness? lauren -- Wednesday, 17 March 2004, at 2:27 p.m. extreme tiredness and lacl of breathe My last doctor,s vist (11/7/98) my blood pressure was down to 130/70. For the last two months I have experienced tiredness and lacl of breath with any |
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