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) This can cause an artery to rupture or the heart to fail under the For more than 90 per cent of people with high blood pressure, the cause is unknown. High Blood Pressure and Erectile Dysfunction - ED and Blood Pressure Having high blood pressure can potentially cause erectile dysfunction. This theory suggests that high artery pressure in the small vessels of the penis High Blood Pressure (Hypertension) - Yahoo! Health The systolic measurement is the pressure of blood against your artery walls . Many different factors can cause high blood pressure, including obesity; Hypertension - high blood pressure - Better Health Channel. Blood pressure is the amount of force exerted on the artery walls by the pumping blood. High blood pressure (hypertension) means that your blood is pumping High Blood Pressure: Heart and Blood Vessel Disorders: Merck Other kidney disorders that cause high blood pressure include renal artery stenosis (narrowing of the artery supplying one of the kidneys), which may be due DHDSP - About High Blood Pressure Blood pressure is the force of blood against the artery walls. . Also, diseases of the kidney can be a cause of high blood pressure. Back to Top High Blood Pressure (Hypertension) - Texas Heart Institute Heart That means the real cause of the high blood pressure is not known, Systolic pressure is the force of blood flow through an artery when the heart beats. Cardiovascular Disease - Hypertension (high blood pressure Blood pressure is normally measured at the brachial artery with a The hardening of the arteries causes an increase in resistance to blood flow, High Blood Pressure Symptoms, Causes and Treatment : Doctor Essential hypertension refers to high blood pressure with no identifiable cause. Reviewer: Larry A. Weinrauch, MD, Assistant Professor of Medicine, Transplantation Proceedings : High-pressure perfusion versus On the other hand, excessive high pressure would cause irreversible organ damage. and preservation by using a back table rinse of the hepatic artery. Pulmonary Arterial Hypertension, Respironics Information on Pulmonary Arterial Hypertension from Respironics. Liver disease - When liver disease causes high blood pressure in the portal vein, What Is High Blood Pressure? When high blood pressure is not found and treated, it can cause: Common locations are the main artery from the heart (aorta); arteries in the brain, High Blood Pressure Kidney disease is an important cause of high blood pressure and also pressure in a pet without actually placing a catheter inside an artery so we make High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis What makes high blood pressure important is that initially it may cause no symptoms but It reflects the pressure of the blood against arterial walls. High blood pressure (hypertension) - causes, treatments and What are the causes of secondary high blood pressure? What do patients feel with high blood How does narrowing of the renal artery cause hypertension? Hypertension (High Blood Pressure) When the cuff is inflated, it compresses (squeezes on) a large artery in the The cause of high blood pressure often cannot be found in many teens with What Causes High Blood Pressure? In 90 to 95 percent of high blood pressure cases, the cause is unknown. For example, doctors can repair a narrowed artery that supplies blood to a Secondary high blood pressure: When another condition causes Various conditions can cause secondary high blood pressure. . With this congenital defect of the body's main artery (aorta), a constriction (coarctation) Hypertension - Wikipedia, the free encyclopedia Only in a small minority of patients with elevated arterial pressure, can a specific cause be identified (in 90 percent to 95 percent of high blood pressure |
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