Arterial blood pressure values measured in a doctor's office are often used as a reference at the moment to take decisions regarding a hypertensive patient and frequently these values are above the real pressure measurements a patient has since these can endure modifications due to multiple factors. Therefore, it is necessary to know what can exercise an influence on the control of arterial blood pressure measurements and to take advantage of those measurements available to professionals in order to obtain the maximum information possible regarding the degree of control over those who suffer hypertension.