We often hear that normal blood pressure is  StrictionBP120/80 or below. Now with pre-hypertension being 120-139/80-89 or hypertension being 140/90 or above we need to understand the numbers. The top number systolic is the pressure of your blood in your veins and arteries just as your heart pumps. The bottom number diastolic is the pressure when your heart is at rest. As we age and the elasticity of your veins and arteries decreases, the top number often will climb while the lower number remains in check. As your arteries become smaller like your garden hose that gets blocked, it takes more force to get the blood water moving. This need for increased force is what I like to call high blood pressure. If you had a squirt gun with a large hole, it would be easy to pull the trigger. If the whole was very tiny, it would take a lot more force to pull the trigger and shoot the water out. Your body is the same way. By relaxing opening the hole the arteries your heart will not have to work so hard and you will have lower blood pressure. This is the mechanism of how blood pressure medications work. Of course there are several categories of BP medications ACE inhibitors, Beta Blockers, Calcium Channel blockers etc., but the final result is the same-reduced pressure on the walls of the arteries.
 

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