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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What Is High Blood Pressure? High blood pressure is a blood pressure reading of 140/90 mmHg or higher. Both numbers are important. Nearly 1 in 3 American adults has high blood pressure. Go Ask Alice!: Blood Pressure Numbers The first number of a blood pressure reading is the systolic pressure, when the ventricular heart contraction is occurring. The second number is the High Blood Pressure - High Blood Pressure By The Numbers Both the systolic and diastolic blood pressure are important numbers. . At what blood pressure reading point do I need to go to the hospital? Blood Pressure Reading A blood pressure reading is recorded with two numbers written like a fraction. The top number in a blood pressure reading measures the systolic blood Blood pressure: A chart explaining your blood pressure reading To get an accurate blood pressure reading, your doctor should evaluate your readings based on Numbers are expressed in millimeters of mercury (mm Hg). Blood pressure The bottom number is the diastolic blood pressure reading. It represents the pressure in the arteries when the heart is at rest. Monitoring Your Blood Pressure This is the number you record. Write down the date, time and blood pressure reading with the higher number on the top and the lower number on the bottom Systolic -- Not Diastolic -- Blood-Pressure Reading Should Define BUFFALO, N.Y. -- Systolic blood pressure, the first -- or higher -- number in a blood-pressure reading, is the important factor in determining whether a Omron Blood Pressure Monitor The Omron blood pressure monitors have large, easy to read numbers. They come with an AC adapter and a storage case. When you take your blood pressure with Top Blood Pressure Number Key For Gauging Heart Disease Risk 3/30/02 The top number in a blood pressure reading is the best way to determine a man's heart attack and stroke risk, and should be used to guide treatment. Blood Pressure Readings - What They Mean A blood pressure reading is shown as two numbers. These numbers measure the pressure against the walls of your blood vessels. The two numbers are usually A menopause community addressing menopause symptoms, menopause Blood pressure is read as two numbers: a top number (systolic pressure), or the pressure of blood in the vessels as the heartbeats; and a bottom number Measuring Blood Pressure, what the numbers mean. The top number, which is called the systolic pressure, shows the pressure in your High blood pressure can be a systolic reading of 140 or above, Blood Pressure Monitoring at Home -- familydoctor.org Listen carefully for the first sound. Check the blood pressure reading by looking at the pointer on the dial. This number will be your systolic pressure. What Is Normal Blood Pressure? If your doctor says you have a high blood pressure reading the first time, don't panic. Blood pressure can vary due to exercise or your body's response to Translating Blood Pressure Numbers It is crucial to ÁœKnow Your NumbersÁ« with respect to Blood Pressure. A blood pressure reading equal to or greater than 140 (systolic) over 90 Blood Pressure The lower (diastolic) number represents the pressure when the heart relaxes A single elevated blood pressure reading doesn't mean you have high blood A Special Message for Women What your blood pressure level means Learn your blood pressure numbers. A reading of less than 120/80 mm Hg is considered normal. What do the numbers mean in a blood pressure reading? The pressure is determined by the force and amount of blood pumped and the size and flexibility of the arteries." A reading consists of two numbers, |
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