Systolic pressure. What's that for?

Systolic blood pressure is referred to as high pressure.

Systolic blood pressure refers to the pressure of blood on the blood vessel wall when the heart contracts. It is an important parameter in blood pressure value. Blood pressure value consists of diastolic blood pressure and systolic blood pressure, usually expressed in the form of diastolic blood pressure/systolic blood pressure. Under normal circumstances, systolic blood pressure should be between 90-139mmHg

.