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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BBC - Health - Conditions - Dizziness Many attacks of dizziness are caused by momentary, harmless drops in blood pressure, leading to a transient reduction in the blood supply to the brain. Dizziness and fainting during pregnancy - BabyCenter It's not uncommon to feel lightheaded or dizzy occasionally. During a normal pregnancy, your blood pressure gradually decreases in the beginning, News: When Space Makes You Dizzy (April 5, 2002) But during landing, astronauts sometimes get a lightheaded dizzy feeling. A temporary drop in blood pressure is the culprit. As astronauts come down, Dizziness People who are prone to dizziness because they take medications for heart conditions or high blood pressure should avoid sudden changes of position. blood pressure dizziness You're about to learn how to virtually eliminate all vertigo, dizziness, nausea and motion sickness symptoms. Learn more about blood pressure dizziness. University of Illinois Medical Center:Health Library Blood pressure should be measured both lying down and immediately after standing. The second reading should be considerably lower if the dizziness is HOW TO TAKE A BLOOD PRESSURE Low blood pressure may cause you to feel dizzy or feel like you are going to faint (pass out). This may happen when you go from a sitting or lying position Information on vestibular balance disorders (causing dizziness Patients often describe balance problems in terms of vertigo, dizziness, For instance, orthostatic hypotension is low blood pressure that occurs upon Dizzy When I Stand Up: Postural Hypotension This type of dizziness, faintness or light-headedness results from a decrease in blood flow to the brain, due to a drop in blood pressure upon standing up. High Blood Pressure, Hypertension, High Cholesterol Forum - Dizzy High Blood Pressure, Hypertension, High Cholesterol Forum - Dizzy, Sweating, Muffled Hearing, Controllable Diarrhea.., High Blood Pressure, Hypertension, Low blood pressure Therefore, if you have a low blood pressure and you also have symptoms of dizziness or faintness when standing up suddenly you should have your blood High blood pressure and dizziness - Heart Disease - MedHelp This is a discussion on MedHelp about High blood pressure and dizziness. Community members of MedHelp provide help, support, guidance and discussion around Natural Remedies for High Blood Pressure High blood pressure usually doesn't cause any symptoms in the early stages. Symptoms associated with high blood pressure can include:. Dizziness or dizzy Blood pressure and diabetes The balance is between keeping well and avoiding diabetic problems, versus the side effects of the tablets, too low a blood pressure and becoming dizzy, Hypertension Vomiting, diarrhea, or heavy sweating can lower your blood pressure and make you dizzy. Hot baths, hot weather, fever, or drinking alcohol can also lower Hypertension: high blood pressure, dizziness, trouble breathing Hi Mariam, A stress test is when you are hooked up to EKG wires and walk a treadmill. An ECG and EKG are the same. As for the tumor, that is what a pheo is. Hypertension: high blood pressure, dizziness, trouble breathing Hi Mariam, Hypertension at your age would be unusual but not impossible. If you haven t had a stress test ot heart echo, you should. MedlinePlus Medical Encyclopedia: Dizziness This can happen if there is a sudden drop in your blood pressure or you are dehydrated from Are you always dizzy or does the dizziness come and go? Low Blood Pressure Consequently, most people with low blood pressure feel dizzy or light-headed when they stand, and some may even faint. People who faint fall to the floor, |
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