Non-invasive recording of the values by a digital device called blood pressure HOLTER which the patient wears continuously 24h. It is placed on the upper arm and it measures the blood pressure, pulse and arterial rigidity for 24 hours. The measurements are done at a programmed period - from 10 to 180 minutes, and the values are registered in digital form in the internal memory. It is used in all cases of increased, reduced or oscillating blood pressure.