Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Blood pressure is one of the principal vital sign. It is the pressure at which blood flows in the blood vessels when pumped by the heart so as to move the blood and oxygen to the different parts of the body. An unhealthy lifestyle usually causes blood pressure to be abnormal. When it is too high, blood pressure is referred to as hypertension, and when it is abnormally low it is known as hypotension. Hypertension problems remains more frequent than hypotension ones...