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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NIHSeniorHealth: High Blood Pressure - Table of contents High Blood Pressure. Table of Contents. What Is High Blood Pressure? Risk Factors and Prevention · Symptoms and Diagnosis · Treating High Blood Pressure High Blood Pressure Symptoms, Causes and Treatment : Doctor 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 Facts about high blood pressure Normal blood pressure is 120 over 80 â” the first figure is the important one and anything over 140 is considered high. Dr Colquhoun: Okay Andrew. Hypertension (High Blood Pressure) Blood pressure of less than 120 over 80 is considered a normal reading for people 18 and over. A borderline high systolic pressure of 120 to 139 or a High Blood Pressure (Hypertension) - Patient UK Depending on various factors, the level at which blood pressure is considered high enough to be treated with medication can vary from person to person. High blood pressure (hypertension): Treatment - MayoClinic.com High blood pressure â” Comprehensive overview covers symptoms, Underlying causes of resistant hypertension should also be considered such as sleep apnea High blood pressure and heart attack information from iVillage High blood pressure is considered a major risk factor for heart attack, heart failure and stroke. About half of people having first-time heart attacks and Hypertension (High Blood Pressure) - Symptoms, Treatment and Questions To Ask Your Doctor About Hypertension (High Blood Pressure). What is a normal blood pressure? What is considered dangerously high, and when should 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) - Prevention of risk factors Blood pressure that is consistently more than 140 / 90 mm Hg is considered high, but if you have diabetes, 130 / 80 mm Hg is high. Normal blood pressure is High Blood Pressure and Kidney Disease Reviews high blood pressure and the effect it has on the kidneys. Your blood pressure is considered normal if it stays below 120/80 (expressed as "120 High blood pressure - information and help about hypertension Information about high blood pressure. Make an informed purchase and trust machines that are considered accurate by th British Hypertension Society. What Are High Blood Pressure and Prehypertension? A blood pressure level of 140/90 mmHg or higher is considered high. About two-thirds of people over age 65 have high blood pressure. If your blood pressure Treatments: Guide to Lowing High Blood Pressure Adopting healthy lifestyle habits is an effective first step in both preventing and controlling high blood pressure. If lifestyle changes alone are not Blood pressure (high) Introduction - Health encyclopaedia - NHS Direct Persistent high blood pressure (hypertension), if untreated puts you at greater risk of having a heart attack (myocardial infarction) or stroke. About High Blood Pressure Blood pressure that stays between 120â“139/80â“89 is considered prehypertension and above this level (140/90 mm Hg or higher) is considered high Blood Pressure A blood pressure reading of 140 over 90 or higher is considered elevated (high). How can I tell if I have high blood pressure? High blood pressure usually High blood pressure (hypertension) - causes, treatments and High Blood Pressure: Medical information about hypertension, its treatment, therapies and and a blood pressure of 140/90 or above is considered high. What is blood pressure? A blood pressure of 140/90 or higher is considered high blood pressure. Both numbers are important. If one or both numbers are usually high, you have high |
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