Blood pressure is considered a good indicator of the condition of the cardiovascular system, because it is one of the physiological variables that can be measured with great convenience. A clinical history of the blood pressure readings has saved many people from a premature death by warning of hypertension with enough anticipation to carry out a treatment. The blood pressure is measured by two parameters:

• The maximum systolic pressure corresponds to the peak of pressure applied by the blood to the walls of the blood vessels when pumped by the heart.
• The minimum diastolic pressure is the minimum pressure applied by the blood to the walls of the blood vessels when the ventricles relax.