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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Publications Confusion or sleepiness; Slowed, slurred speech, or shallow breathing; Weak pulse or low blood pressure; A change in behavior during cold weather or a Cold Weather and Cardiovascular Disease People who are outdoors in cold weather should avoid sudden exertion, like lifting a heavy shovel full of snow. Even walking through heavy, wet snow or snow Cold Weather Can Increase Heart Disease Risks Heart Disease Symptoms Cold Weather Can Increase Heart Disease Risks If you have high blood pressure, talk to your doctor before choosing an over-the-counter cold or flu Cold Weather Acclimation More blood in the same arteries means higher blood pressure. There are reports also that the arteries constrict in cold weather as well. Blood pressure is Dog Owner's Guide: Cold Weather Complications Mild hypothermia causes an increase in blood pressure and heart rate, but if the time and Looking for more information about Cold weather complications, cold weather training Human blood also clots more easily in cold weather, which might increase the risk . blood pressure doesn't soar too high, and fuel availability is ample. Health Department Offers Cold Weather Advice Since cold weather puts an extra burden on the heart, if you have cardiac problems or high blood pressure, follow your doctorâ™s orders about shoveling or Does cold weather affect high blood pressure? - Yahoo! Answers Cold weather makes the blood vessels constrict, and when vessels constrict, pressure goes up. So if a person already has high blood pressure, Cold Weather Raises BP & Heart Attack Risk In situations of extreme or long term cold weather, it is prudent for those with high blood pressure to exercise extra caution with physical activity. University of Florida Health News -- Cold weather hikes blood Cold weather hikes blood pressure, UF scientist warns. Tom Nordlie 01/18/2005. When winter arrives and temperatures drop, thereâ™s one place the mercury high blood pressure semi cold weather - HealthBoards.com Message high blood pressure semi cold weather High & Low Blood Pressure. Heart Attacks More Likely in Cold Weather -- ThirdAge The study highlights the special vulnerability that people with high blood pressure have to cold weather and underlines the importance of getting their Cold weather, high blood pressure dangerous People with hypertension seem to be more vulnerable to heart attacks when the temperature goes down. CDC Winter Weather | A Prevention Guide to Promote Your Personal Cold weather puts an extra strain on the heart. If you have heart disease or high blood pressure, follow your doctorâ™s advice about shoveling snow or University of Florida News - Cold weather hikes blood pressure, UF Cold weather hikes blood pressure, UF scientist warns. Filed under Research, Health on Tuesday, January 18, 2005. GAINESVILLE, Fla. High Blood Pressure and Cold Weather Itâ™s January and every high blood pressure sufferer should be aware of the fact that the cold weather can increase your risk of heart attack and strokes. High BP + Cold Weather Ups Heart Attack Risk Asked about the high blood pressure-cold weather link, Rose Marie Robertson, MD, chief science officer at the American Heart Association (AHA), tells WebMD, Cold Weather Hikes Blood Pressure, UF Scientist Warns When winter arrives and temperatures drop, thereâ™s one place the mercury actually rises â” in blood pressure gauges. A survival mechanism in people and other Cold Weather Can Raise Blood Pressure Cold temperatures can raise blood pressure, say University of Florida researchers. |
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