Central Time is 2 hours ahead of Pacific Time. The mainland U.S. has four time zones (Alaska and Hawaii each have their own time zâ¦ones, which makes a total of 6 different time zones for the U.S.). From west to east, the mainland U.S.'s time zones are: Pacific Time, Mountain Time, Central Time and Eastern Time.
It includes a sensor strapped to the wrist which can measure the pressure in the aorta, the main artery close to the heart, where high blood pressure does most damage. A sensor in the watch records the pulse wave of the artery, which is then fed into a computer together with a traditional blood pressure reading from a cuff. In most people the pressure in the aorta is 10mm Hg lower than in the arm, but in some, especially younger people, it is as much as 30mm Hg lower.
Either a sphygmomanometer or a special machine is used to measure blood pressure. During this procedure, two numbers are recorded -- one appearing over the other as a fraction. The top number represents pressure when your heart is beating; the bottom number measures pressure when your heart is resting. The unit used when taking a blood pressure reading is millimeters of mercury (mmHg).