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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Hypertension (High Blood Pressure) - Symptoms, Treatment and Symptoms, Treatment and Prevention of Hypertension (High Blood Pressure) High Blood Pressure - Symptoms Symptoms of Malignant Hypertension. In rare cases (fewer than 1% of all patients with hypertension), the blood pressure rises quickly (with diastolic High Blood Pressure (Hypertension) - Yahoo! Health Malignant high blood pressure (hypertensive crisis), which is hypertension that rises rapidly, can also cause these symptoms. High Blood Pressure Symptoms, Causes and Treatment : Doctor Pre-hypertension is when your systolic blood pressure is between 120 and 139 or Hypertension (high blood pressure) can be caused by using a chemical 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, High Blood Pressure Treatment and Medication - BP Success Zone Information about high blood pressure, including medication and treatment with High Blood Pressure Symptoms · People at Risk for High Blood Pressure High blood pressure (hypertension): Signs and symptoms High blood pressure â” Comprehensive overview covers symptoms, treatment and prevention of hypertension. What is hypertension - WebMD What is hypertension? What causes hypertension and what are the symptoms? Blood pressure is the force of blood pushing against blood vessel walls. Low blood pressure (hypotension) - MayoClinic.com After all, high blood pressure (hypertension) is a well-known risk factor for heart disease and other problems. Signs and symptoms High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis Learn about high blood pressure (hypertension) - causes, symptoms, treatment & prevention of. High Blood Pressure Symptoms | Causes | Diet | Treatment HIGH BLOOD PRESSURE HYPERTENSION LOW BLOOD PRESSURE CAUSES SYMPTOMS SIGNS DIAGNOSIS DIET What are symptoms of high blood pressure or Hypertension |
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