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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JAMA -- Abstract: The relationship between 'job strain,' workplace The relationship between 'job strain,' workplace diastolic blood pressure, and left ventricular mass index. Results of a case-control study MedlinePlus Medical Encyclopedia: Blood pressure The bottom number is the diastolic blood pressure reading. Most people cannot sense if their blood pressure is high (hypertension) because there are Hypertension (High Blood Pressure) - Symptoms, Treatment and A normal blood pressure is less than 130 (systolic)/85 (diastolic). High normal blood pressure is a systolic from 131-139 and a diastolic from 85-89. Diagnose-Me: About Diastolic Blood Pressure "90 to 100 (elevated)", High diastolic blood pressure, A symptom. 5. "Over 100 (very elevated)", High diastolic blood pressure, A symptom High blood pressure The diastolic pressure (the second and lower number) is the measurement of force as the heart relaxes to allow the blood to flow into the heart. High High blood pressure (hypertension) Around 10 million people in the UK have high blood pressure - that's one in five of us. The second figure is the diastolic blood pressure. Blood pressure (high) Introduction - Health encyclopaedia - NHS Direct Hypertension (high blood pressure) is defined as a systolic pressure of 140 mmHg or more, or a diastolic pressure of 90 mmHg or more. Publications This is the diastolic pressure. If your blood pressure is normal, your systolic More than half of Americans over age 60 have high blood pressure. High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis High blood pressure in adults is defined as a consistently elevated blood pressure of 140 mm Hg systolic and 90 mm Hg diastolic or higher. What is blood pressure? (Top number), Diastolic (Bottom number). Normal, Less than 120, Less than 80. Prehypertension, 120-139, 80-89. High Blood Pressure, Systolic, Diastolic What Is High Blood Pressure? Blood Pressure Category, Systolic (mm Hg), Diastolic (mm Hg). Normal, less than 120, and, less than 80. Prehypertension, 120â“139, or, 80â“89. High Heartpoint: High Blood Pressure Information The medical communityâ™s knowledge of high blood pressure is great, the arteries when the heart is not pumping is termed the "diastolic" blood pressure. DHDSP - About High Blood Pressure High blood pressure or hypertension for adults is defined as a systolic blood pressure of 140 mmHg or higher or a diastolic blood pressure of 90 mmHg or Blood pressure - Wikipedia, the free encyclopedia In the past, most attention was paid to diastolic pressure; but nowadays it is recognised that both high systolic pressure and high pulse pressure (the Blood Pressure Hypertension Systolic Diastolic For many years physicians have concentrated on treating hypertension or high blood pressure by trying to lower the diastolic pressure. Diastolic pressure is What Is High Blood Pressure? Category, Systolic (top number), Diastolic (bottom number). Normal, Less than 120, Less than 80. Prehypertension, 120â“139, 80â“89. High blood pressure High blood pressure (hypertension) - causes, treatments and High Blood Pressure: Medical information about hypertension, An elevation of the systolic and/or diastolic blood pressure increases the risk of High Blood Pressure (Hypertension) - Patient UK For example, it is estimated that reducing a high diastolic blood pressure by 6 mmHg reduces your relative risk of having a stroke in the future by about What Are High Blood Pressure and Prehypertension? It is shown as the top number in a blood pressure reading. High blood pressure is 140 and higher for systolic pressure. Diastolic pressure does not need to |
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