Large pulse pressure difference

Blood pressure refers to the pressure on the side wall of a blood vessel while blood is flowing. Blood pressure is divided into systolic and diastolic blood pressure, and the difference between systolic and diastolic blood pressure is called "pulse pressure difference". For example, systolic blood pressure is 120 mmHg, diastolic blood pressure is 80 mmHg, and pulse pressure difference is 40 mmHg. Under normal circumstances, the pulse pressure difference of normal people is 20 ~ 60 mm Hg (2.67 ~ 8.0Kpa), the pulse pressure difference is greater than 60 mm Hg, and less than 20 mm Hg is too small.