Systolic is the phase in the cardiac cycle when the ventricles contract to pump the blood into the arteries. The highest pressure employed by blood on the arterial wall during this phase called systolic pressure. The word systolic comes from the Greek word systole, which means drawing in together. This work is typically exemplified by the top number in the blood pressure readout. The ventricles are in a restricted state in this phase. The average systolic pressure is around 120mmHg, and the normal range is between 95-120mm. Diastole is the loosened phase of the cardiac cycle when the whole heart is comfortable, and the blood flows into the upper chambers of the heart. During this time, there is also blood in the arteries. The lowest pressure exerted by the blood on the wall of the arteries is called diastolic. The usual range of diastolic pressure is 60-80 mm. If it goes above this number, it should be treated medically.
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