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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MedlinePlus Medical Encyclopedia: Hypotension Dizziness or lightheadedness can result. See also: Blood pressure. Causes Return to top. Blood pressure that is borderline low for one person may be normal Re: Indreal and dizziness?/low blood pressure In regards to the low blood pressure, I don't know if my pressure goes to low when I have these dizzy spells. I do know that the information that comes with low pressure blood dizziness You're about to learn how to virtually eliminate all vertigo, dizziness, nausea and motion sickness symptoms. Learn more about low pressure blood dizziness. Introduction: Low Blood Pressure: Merck Manual Home Edition Consequently, most people with low blood pressure feel dizzy or light-headed, particularly when they stand, and some may even faint. Low Blood Pressure (hypotension) Low blood pressure can be caused by certain medications or treatable diseases. If you have symptoms of low blood pressure, such as dizziness, weakness, Low Blood Pressure I've been having dizzy spells almost everyday for the past month. My neurologist says that it is a combination of low blood pressure and stress. Orthostatic Hypotension Orthostasis means upright posture, and hypotension means low blood pressure. Thus, orthostatic hypotension consists of symptoms of dizziness, faintness or Low blood pressure - hypotension Information about low blood pressure. if you have symptoms that suggest a fall in blood pressure when you stand up, ie, dizziness or faintness. Low Blood Pressure or Hypotension Symptoms, Cure, Cause, Treatment Consequently, most people with low blood pressure feel dizzy or light-headed when they stand, and some may even faint. However, if blood pressure is low Low blood pressure - WebMD Learn about low blood pressure, also known as hypotension. Low blood pressure can be a sign of good This can lead to dizziness or lightheadedness. Low Blood Pressure: USC Care Dizziness, Fainting Could Point to Low Blood Pressure. All those with unusually low blood pressure, please remain seated. Indeed, for people with a Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Learn about low blood pressure (hypotension) is blood pressure below normal. Low blood pressure symptoms may include: lightheadedness, dizziness, Your High Blood Pressure Questions Answered â” Low Blood Pressure Low blood pressure is generally considered dangerous when it drops suddenly or is accompanied by symptoms, such as dizziness or fainting. Severely low blood Dizziness and vertigo - Better Health Channel. Medical conditions â“ about five per cent of dizziness cases are caused by underlying medical conditions such as low blood pressure, infection, Dizziness Dizziness is the false sensation of movement or spinning. If blood pressure has dropped too low, the person may faint, a temporary loss of consciousness Low blood pressure (hypotension) - MayoClinic.com For many people, low blood pressure can cause dizziness and fainting or indicate serious heart, endocrine or neurological disorders. Severely low blood Low blood pressure (hypotension): Causes - MayoClinic.com Doctors often break down low blood pressure (hypotension) into different fails and blood pressure falls, leading to dizziness, lightheadedness, 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 Dizziness, Vertigo Symptoms If low blood pressure is a symptom contributing to your dizziness and you are taking medications to control high blood pressure, talk with your doctor about |
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