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) Around 10 million people in the UK have high blood pressure - that's one in five of us. Blood pressure is measured using two numbers. High Blood Pressure - Things you can do to help lower yours Your doctor will measure your blood pressure at more than one visit to see if you have high blood pressure. The number of visits at which your doctor will high blood pressure articles, information and news The report says that Americans are getting older and fatter and that's causing the number of adults with high blood pressure to rise. High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis Even if high blood pressure does cause symptoms, the symptoms are usually mild the diastolic blood pressure (the lower number) often exceeds 140 mm Hg. Hypertension (High Blood Pressure) - Symptoms, Treatment and High blood pressure is a factor in 68 percent of all first heart attacks and of treatment for patients whose diastolic pressure (the bottom number) is MedlinePlus Medical Encyclopedia: Hypertension The bottom number is your diastolic pressure, the pressure inside blood vessels when the heart is at rest. It is considered high if it is consistently over High Blood Pressure and Kidney Disease Reviews high blood pressure and the effect it has on the kidneys. measure it with a blood pressure cuff. The result is expressed as two numbers. High Blood Pressure: Things You Can Do to Help Lower Yours Lowering Blood Pressure. What is high blood pressure? What do the numbers mean? How is high blood pressure diagnosed? How often should I have my blood High blood pressure (hypertension) - causes, treatments and It turns out that grapefruit juice can directly or indirectly interact in important ways with a number of medications, including high blood pressure High blood pressure (hypertension): Screening and diagnosis High blood pressure â” Comprehensive overview covers symptoms, treatment and prevention of Both numbers in a blood pressure reading are important. Hypertension (High Blood Pressure) About one in five Americans has high blood pressure. 95% of kids at the same age, height, and gender will have blood pressure below this number). Blood pressure (high) Introduction - Health encyclopaedia - NHS Direct Persistent high blood pressure (hypertension), if untreated puts you at greater numbers of people who have high blood pressure but are not aware of it. About High Blood Pressure Your doctor may take several readings over time before deciding whether your blood pressure is high. What do blood pressure numbers indicate? Blood Pressure The lower (diastolic) number represents the pressure when the heart relaxes High blood pressure usually has no symptoms. In fact, many people have high WebMD Hypertension/High Blood Pressure Center - Find high blood Find in-depth high blood pressure and hypertension information including its Understanding Cholesterol Numbers · A Little Walking Cuts Blood Pressure High blood pressure - information and help about hypertension One in every three women and two in every five men now have high blood pressure, with larger numbers affected in older age groups. 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. Measuring Blood Pressure, what the numbers mean. In other words, Know Your Numbers! The higher your blood pressure, whatever it is, the high your risk of a stroke or heart attack. What Is High Blood Pressure? A blood pressure of 140/90 mmHg or higher is considered high blood pressure. Both numbers are important. If one or both numbers are usually high, |
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