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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Hypertension Effect of Antecedent Hypertension and Follow-Up Blood Pressure on Outcomes After Wilkins publishes the AHA Journals for the American Heart Association High Blood Pressure (Hypertension) - Texas Heart Institute Heart High Blood Pressure is known as "the silent killer" because many people do not know they have the condition. High blood pressure and heart attack information from iVillage Read about high blood pressure, or hypertension, and heart attack risks at iVillage Total Health.com. DHDSP - High Blood Pressure Home Page It is estimated that 1 of 3 American adults has high blood pressure or hypertension. Having high blood pressure increases oneâ™s chance for developing heart High Blood Pressure & Heart Attack High blood pressure can be an important contributing factor to heart attack. There are many reasons for this, and understanding the links between high blood Vitals: Blood Pressure and Heart Rate Enter information in left column; blood pressure, heart rate, and select appropriate gender. Click "Calculate". Evaluates adults (18 years of age and older) Hypertension (High Blood Pressure) Blood pressure rises with each heartbeat and falls when the heart relaxes That blood pressure comes from two physical forces. The heart creates one Blood pressure measurement Most people have had their blood pressure taken at some time. It is a simple and painless procedure that gives a lot of useful information about the heart Consumer Reports Health - Calcium Blockers CCBs are typically not prescribed as initial or first-step treatment in people with high blood pressure who have no other form of heart disease. High Blood Pressure and Heart Attack The heart pumps blood into the arteries (blood vessels), which carry the blood throughout the body. Blood pressure is the force or pressure of blood inside High Blood Pressure: Heart and Blood Vessel Disorders: Merck Uncontrolled high blood pressure increases the risk of problems such as stroke, aneurysm, heart failure, heart attack, and kidney damage. What is blood pressure? Blood is carried from the heart to all parts of your body in vessels called arteries. Blood pressure is the force of the blood pushing against the walls of What Is High Blood Pressure? Your blood pressure is at its highest when the heart beats, pumping the blood. With high blood pressure, the heart works harder, your arteries take a Heart and Vascular Disease Information for Patients and the Public Keep Your Heart in Check-Know Your Blood Pressure Number/Hay Kham Kiem Tra Tim - Biet So Do Huyet Ap Cua Ban (bilingual English, Vietnamese) Blood pressure - Wikipedia, the free encyclopedia The American Heart Association website 7 states, "You may have what's called 'white coat hypertension'; that means your blood pressure goes up when you're Hypertension/High Blood Pressure Health Center With each beat of the heart, blood is pumped out of the heart into the blood vessels, which carry blood throughout your body. Blood pressure is the What Is High Blood Pressure? Learn about various levels of blood pressure and how high blood pressure (hypertension) is defined. High Blood Pressure Many people have high blood pressure for years without knowing it. Uncontrolled high blood pressure can lead to stroke, heart attack, congestive heart |
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