Hypertension is a persistent elevation of blood pressure above certain levels and employs about 25% of the adult population. High blood pressure usually causes no symptoms and the diagnosis is based solely on the measurement of blood pressure. Measuring the pressure with the modern pressure gauges are relatively simple, provided prior training in the proper use of the device, there is necessarily the appropriate dimension air chamber according to the circumference of the arm and be meticulous record of results in ‘millimeters of mercury’ Fr. .g. 135/85 mmHg. Pressure price levels are constantly changing during the day for that, in order to determine the level of pressure, need many measurements at different times of day (morning & afternoon) in calm conditions. Measurements under unsuitable conditions eg jittery, pain, panic, etc. It can be very misleading and not generally represent the “real” pressure. In most cases you need to repeat the measurement a little later, keeping calm conditions.