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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Medindia.net - Blood Pressure charts Medindia's simple tool alerts you if for your age your blood pressure is abnormal by displaying the normal values. This measurement is important if you are High blood pressure (hypertension) There is a natural tendency for blood pressure to rise with age due to the reduced elasticity of the arterial system. Age is therefore one of the factors Blood pressure and age Scientific studies show that the blood pressure increases with age. Of course, the age of a patient cannot be altered but the doctor must consider the age How being older affects your blood pressure - CNN.com Why you're more susceptible to high blood pressure as you age. As you age, your blood pressure The importance of treating high blood pressure at any age 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 Overall blood pressure levels Mean systolic blood pressure increases with age in both men and women. Blood pressure levels by sex and age, adults aged 16 and over, 2005, Age differences and blood pressure Blood pressure levels by sex and age, adults aged 16 and over, 2003, Blood pressure levels, by age and sex, adults 65 years and above, 2000, Measuring the Blood Pressure 'Normal' or 'acceptable' blood pressure varies with age, state of health and clinical situation. At birth, a typical blood pressure is 80/50 mmHg. Blood pressure: information about, high blood pressure, symptoms In humans, blood pressure doesn't vary greatly. In healthy persons, blood pressure increases from about 80/45 in infants, to about 120/80 at age 30, The association between blood pressure, age, and dietary sodium In men, but not women, age-adjusted systolic and diastolic blood pressure correlated significantly with dietary sodium intake. In both men and women, High Blood Pressure (Hypertension) - Patient UK A score is calculated which takes into account all your risk factors (such as age, sex, smoking status, blood pressure, blood cholesterol level, etc). High Blood Pressure, Factors That Contribute to Increasing age. Blood pressure tends to increase with age, and occurs most often in people older than age 35. Men have a greater risk of high blood pressure All about high blood pressure High blood pressure (hypertension) is very common and the proportion of both men and women with high blood pressure increases steadily with age. High Blood Pressure: Genetics, Age and Lifestyle In such cases, it should be noted that most causes of high blood pressure in middle age and later life are still uncertain. The main difference is that in The Effects of Aging on High Blood Pressure - Blood Pressure Age Blood pressure tends to increase as people get older, but may occur differently in each person. Blood Pressure Studies prove that lowering the systolic number cuts down on strokes and heart attacks in people age 60 and over. What are the numbers in the blood pressure High blood pressure and exercise: Why activity is key - MayoClinic.com The risk of high blood pressure (hypertension) increases with age. And like it or not, you get older every day. But you don't need to sit back and wait for Definition: blood pressure from Online Medical Dictionary Blood pressure varies with age and sex of the individual. A rough rule of thumb for normal systolic pressure is 100 + Age of individual. |
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