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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Noncontactive arterial blood pressure monitor and measuring method
(e) calculating mean pressure P.sub.m and systolic pressure P.sub.s from the This invention relates to arterial blood pressure monitoring and more

(WO/1989/003656) NONINVASIVE CONTINUOUS MEAN ARTERIAL BLOOD
SLOPE where MAP is the calculated mean arterial blood pressure, and calculating the mean arterial blood pressure of the patient based upon the measured

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Noncontactive arterial blood pressure monitor and measuring method
This invention relates to arterial blood pressure monitoring and more particularly .. Calculate a mean pressure in accordance with the formula ##EQU12##

Noncontactive arterial blood pressure monitor and measuring method
Noncontactive arterial blood pressure monitor and measuring method - US Patent (e) calculating mean pressure Pm and systolic pressure Ps from the signal

A comparison of the indirect estimate of mean arterial pressure
The standard equation used to calculate mean arterial pressure (MAP) assumes (SP) and diastolic (DP) blood pressure was measured by manual auscultation.

Noninvasive Measurement of Systemic Arterial Blood Pressure in the
peaks were used to calculate mean a SD systolic and dia- .. arterial pressure and HR. Mean directly measured blood pressures and HR are plotted on the

Mean arterial blood pressure estimation and its limitation -- Ahn
Mean arterial blood pressure (MAP) has clinical and physiologic significance in both the 1 Poullis M. New formula to calculate mean aortic pressure?

Blood pressure - Wikipedia, the free encyclopedia
Some monitors also calculate and display CPP (cerebral perfusion pressure). . The mean arterial pressure (MAP) is the average pressure measured over one

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Systemic Vascular Resistance (SVR) Mean Arterial Pressure (MAP) Central PRESS HERE TO CALCULATE Cardiac Index (CI) cardiac output is the amount of blood

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Cardiac Indices Calculate cardiac indices (e.g., mean arterial pressure (MAP), systemic vascular resistance index (SVRI)) from heart rate, systolic blood


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