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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Low Blood Pressure
Dramatic clinical symptoms such as fainting or loss of consciousness can occur with sudden drop in blood pressure, after eating, or after suddenly standing

A dramatic drop in blood pressure following prehospital GTN
Several minutes after the GTN the patient experienced a sudden drop in blood pressure and heart rate, this was rectified by atropine sulphate and a fluid

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His complaints seemed to be because of the sudden drop in blood pressure, and so an intravenous fluid support with accompanying 5 μg/kg/dk of dopamine

What causes a sudden drop in blood pressure after donating plasma
What causes a sudden drop in blood pressure after donating plasma?

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Order from the British Library: Patient with a sudden drop in blood pressure.

Patient with a sudden drop in blood pressure.
Patient with a sudden drop in blood pressure. Oliver JA, Landry DW. Publication Types:. Comment · Editorial. MeSH Terms:

WikiAnswers - Can temporal lobe seizures cause sudden drop in
Low sodium low blood sugar and blood pressure drop? What does drop in blood pressure mean in pregnancy? What is yhe importance of temporal lobe?

Sudden blood pressure drop in the elderly could be onset of
If you are elderly and your blood pressure suddenly drops, you could be in the initial stages of Alzheimer's disease or some other form of dementia,

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Sudden drop in pressure or further drop in pressure in low pressure patients can make them collapse, thus endangering life. Low diastolic blood pressure

Sudden drop in blood pressure - WrongDiagnosis.com
Sudden drop in blood pressure information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues.

Tilt Table Test: Frequently Asked Questions
Patients that have symptoms suggestive of a sudden drop in blood pressure may benefit from the evaluation of blood pressure regulation with a tilt table

Low blood pressure
This drop in blood pressure when you stand up is called postural hypotension. Acute illness, for example, severe blood loss and sudden severe infection

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A sudden drop in blood pressure after a meal usually affects older adults with high blood pressure or autonomic nervous system disorders such as Parkinsonâ™s

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This may cause a drop in blood pressure but the first question to come to mind is: This sudden drop in your pressure can cause a stroke, and off to the

Low blood pressure - WebMD
What Causes a Sudden Drop in Blood Pressure? Sudden drops in blood pressure can be life-threatening. Causes of this type of hypotension include:

The Caregiver's Home Companion - Sudden Blood Pressure Drop Could
A sudden drop in blood pressure in the elderly could indicate the onset of Alzheimerâ™s disease or other forms of dementia, according to scientists who have

Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and
Postural (orthostatic) hypotension is a sudden drop in blood pressure when an individual stands up from a sitting, squatting, or supine (lying) position.

High Blood Pressure - Sudden drop in blood pressure
Sudden drop in blood pressure. by TnVolunteer Sunday, November 25, 2007. I have been living with sudden drops in my blood pressure that causes me to pass

Low blood pressure (hypotension): Causes - MayoClinic.com
It occurs when low blood volume causes a sudden drop in blood pressure and a corresponding reduction in the amount of oxygen reaching your tissues.


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