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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NHLBI Study Finds High-Normal Blood Pressure Increases High-normal blood pressure significantly increases the risk of heart attack, stroke, and heart failure, according to a new study supported by the National Blood Pressure Monitors: advice on accurate blood pressure monitors The only way for you to know if you have normal, high or low blood pressure is to have it measured; You can measure your blood pressure in your own home Normal Blood Pressure Rate in Children - What is the normal blood Blood pressure is how hard the blood is flowing against the walls of blood vessels in the body. Thresholds for normal blood pressure and serum cholesterol The proportions are disturbingly high even if only the recommended thresholds for blood pressure are applied. However, if the threshold for normal Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Normal diastolic blood pressure falls between 60 and 80 mm Hg. Current guidelines define normal blood pressure as lower than 120/80. What Is High Blood Pressure? A blood pressure reading below 120/80 mmHg is considered normal. In general, lower is better. However, very low blood pressure can sometimes be a cause for High blood pressure (hypertension) The systolic pressure is always listed first, then the diastolic pressure. A typical normal blood pressure reading would be 120/80 mmHg. Categories for Blood Pressure Levels in Adults: Guide to Lowering HBP Blood Pressure Level (mmHg). Category, Systolic, Diastolic. Normal, < 120, and, < 80. Prehypertension, 120-139, or, 80-89. High Blood Pressure Blood pressure - Wikipedia, the free encyclopedia ScienceDirect - The American Journal of Emergency Medicine : The Normal Difference in Bilateral Indirect Blood Pressure Recordings in Normotensive Low blood pressure (hypotension): Causes - MayoClinic.com Current guidelines identify normal blood pressure as lower than 120/80 â” many experts think 115/75 is optimal. Higher readings indicate increasingly serious High Blood Pressure: Things You Can Do to Help Lower Yours A normal blood pressure is 120/80 or lower. High blood pressure is 140/90 or higher. If your blood pressure is between 120/80 and 140/90, you have something What is hypertension - WebMD Get the basics about hypertension -- what normal blood pressure is, and what causes high blood pressure. MedlinePlus: High Blood Pressure 120/80 or lower is normal blood pressure; 140/90 or higher is high blood pressure; 120 and 139 for the top number, or between 80 and 89 for the bottom Blood pressure normal? Maybe now it isnâ™t. The changes included a new definition of "normal" blood pressure. This meant that 45 million Americans who had gone to sleep with normal blood pressure woke Low blood pressure Until recently, normal blood pressure was considered to be the average blood pressure of the population, ie, in the UK the average adult blood pressure is Blood Pressure Chart - Normal Blood Pressure Range Normal blood pressure range chart, using a blood pressure monitor. Measuring Blood Pressure, what the numbers mean. This is why it is important to have your blood pressure checked regularly. Even if your blood pressure is 'normal', ie, below 140/90mmHg, What Is Normal Blood Pressure? Look at a chart of blood pressure readings to see if your blood pressure is normal or too high. |
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