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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Blood pressure and diabetes Do not worry if you cannot reach the ideal blood pressure of 130/80 or below. Some people, particularly if you have lots of medical problems, High blood pressure - Everybody - Health Information for New This is called the diastolic pressure. The pressure is measured in millimetres of mercury (mmHg). An ideal blood pressure is often quoted as being about 130 Keep a Blood Pressure Diary Ask your doctor what your ideal blood pressure numbers should be. Medical guidelines state that a normal blood pressure for most adults is less than 120/80 High Blood Pressure Symptoms and Treatment A reading of 140/90 or higher qualifies as high blood pressure. An ideal blood pressure reading is 120/80. However, blood pressure varies throughout a The Seattle Times: Health: New blood-pressure guidelines pay off Zanchetti and company also proposed 80 as the ideal number for diastolic pressure, the second number on a blood-pressure reading. Healthy Hearts: Hypertension/High Blood Pressure - The Human Heart There is no "ideal" blood pressure reading. However, there is a range of "normal" blood pressure readings. Generally, a reading that is less than 120 over Learn to Find Your Ideal Blood Pressure Learn how you can find your ideal blood pressure based on your body size and age. Blood Pressure This is an ideal blood pressure of a healthy adult at rest. This varies throughout the day in a circadian rhythm, being lower during the night. Weight and blood pressure - overweight and health problems The more you weigh the higher your blood pressure is likely to be. Your ideal weight will depend on how tall you are and whether you are male or female. Low blood pressure However, this is not an ideal blood pressure. For instance, the Yamomamo Indians who live in the tropical jungle of Venezuela and still lead the same Ideal Blood Pressure This eMedTV article describes how ideal blood pressure can vary from person to person based on factors such as family history. Because ideal blood pressure |
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