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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High Blood Pressure (Hypertension) - Yahoo! Health Malignant high blood pressure (hypertensive crisis), which is hypertension that rises rapidly, can also cause these symptoms. High blood pressure - hypertension symptoms, cause, treatment and risk BUPA health factsheet - high blood pressure (hypertension) and its symptoms, the cause, available treatment and the risk related to the condition. High blood pressure - what is hypertension? A small number of people have what is called secondary hypertension, which means that there is an underlying cause of their high blood pressure. High Blood Pressure: Things You Can Do to Help Lower Yours High blood pressure (also called hypertension) occurs when your blood moves through In some people, alcohol causes blood pressure to rise quite a lot. WebMD Hypertension/High Blood Pressure Center - Find high blood High blood pressure affects I in 4 American adults. Find in-depth high blood pressure and hypertension information including its causes, symptoms, High Blood Pressure (Hypertension) Links to information on high blood pressure or hypertension. weeks) is often caused by high blood pressure and is the leading cause of newborn deaths, Secondary high blood pressure: When another condition causes Secondary high blood pressure: When another condition causes hypertension. Various conditions can cause secondary high blood pressure. High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis Learn about high blood pressure (hypertension) - causes, symptoms, treatment & prevention of. What Is High Blood Pressure? High blood pressure (or hypertension) is defined in an adult as a blood pressure greater than or equal to 140 mm Hg systolic pressure or greater than or High Blood Pressure (Hypertension) - Patient UK What causes high blood pressure? The cause is not known in most cases This is called 'essential hypertension'. The pressure in the arteries depends on how Hypertension - Wikipedia, the free encyclopedia There are some anecdotal or transient causes of high blood pressure. These are not to be confused with the disease called hypertension in which there is an High blood pressure (hypertension) For more than 90 per cent of people with high blood pressure, the cause is unknown. This is called 'primary' or 'essential hypertension'. MedlinePlus: High Blood Pressure (Mayo Foundation for Medical Education and Research); Secondary High Blood Pressure: When Another Condition Causes Hypertension(Mayo Foundation for Medical Hypertension (High Blood Pressure) The cause of high blood pressure often cannot be found in many teens with hypertension. When the cause is unknown, a person has what's called essential or Hypertension: What Causes High Blood Pressure A detailed discussion of Hypertension / High blood pressure including the causes, effects, symptoms and treatments. Hypertension or High Blood Pressure - cardiologychannel Hypertention (HTN), or high blood pressure has a high incidence throughout the world High Blood Pressure (Hypertension) (continued) Overview, Causes High Blood Pressure (Hypertension) High blood pressure, also called hypertension, is a condition most often The causes of high blood pressure differ, depending on the age of the child. High Blood Pressure - hypertension, symptoms, causes, beta High blood pressure (also called hypertension) information relating to symptoms, causes, diastolic pressure, systolic pressure, primary hypertension, High blood pressure (hypertension) - causes, treatments and What are the causes of secondary high blood pressure? Renal (kidney) hypertension; Adrenal gland tumors; Coarctation of the aorta; The metabolic syndrome |
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