FROM OUR EXPERTS
Let’s first take a look at what drives your blood pressure. Unlike a river, which flows continuously downstream, blood flow is pulsatile, with ebb and flow driven by pumping heart muscle. This cycle repeats itself 60 or so times each minute, every time your heart beats. With each heartbeat occurring about once per second, the heart squeezes, or contracts, within a split-second. The rapid contraction forces about 90 cc of blood (approximately 1/3 cup) up, pushing the aortic valve open, and blood passes up into the aorta and rapidly distributes upward to the brain (via the carotid arteries on either side of the neck), the arms, and downward to the abdomen, pelvis, and legs. The force of heart contraction and its rapid distribution to the body is measured as systolic pressure, or the top number in blood pressure. As the 90 cc or so of ejected blood distributes rapidly throughout the body, pressure in all the arteries drops over the ensuing half second, and the aortic valve closes. Th...
In 1973, the late Dr. Robert Atkins published his first book entitled “Dr. Atkins’ Diet Revolution: the high calorie way to stay thin forever.” In this publication, Dr. Atkins proposed that a diet high in protein but very low in carbohydrates was the key to weight loss. Biologically, it made more sense to him that by depriving the body of carbohydrates, one of the major dietary sources of calories, the body would be forced to utilize its fat stores for energy and thereby weight loss would be the end result. His book was not such a big seller in the 1970s. However, after some revisions, including a new title and a re-release of the book in today’s society in which obesity has doubled in the past 20 years – with approximately 2/3 of the population being overweight and 1/3 considered obese – Dr. Atkins has sold over 10 million copies of his revised book entitled “Dr. Atkins’ New Diet Revolution.” Most experts agree that the Atkins&rs...
Protein S is a substance that prevents blood clotting. A blood test can be done to see how much of this protein you have in your blood.
How the test is performed
Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.
Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.
In infants or young children, a sharp tool called a lancet may be used to puncture the skin and make it bleed. The blood collects into a small glass tube called a pipette, or onto a slide or test strip. A ban...
You should know
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