it is also known as systol
The pressure is highest in the arteries and lowest in the veins.
Systolic Pressure (the other is Diastolic) is the squeezing of the ventricles as they push blood out of the heart and along the arteries to either the body or the lungs.Diastolic Pressure is when the heart is at its most relaxed after the Systolic squeezing.ie a Blood Pressure reading of 120/80mm Hg (which is the ideal) is 120mm HG Systolic Pressure - when there is the most force pushing the blood - over 80mm HG - when there is the least force behind the blood flow.systolic reading denotes the force of contraction of heart and diastolic reading represents relaxation of heart