the systolic sound is caused by ventricular contraction
Systolic sound are caused by the sounds of turbulent blood flow as it moves through the constricted artery.
There will be no systolic sound if blood is flowing freely. This occurs when there is no measurable constriction of an artery.
The disappearance of sound is caused by blood flowing freely. The blood flows freely because there is no constricted artery.
systolic
Rapid potassium infusion causes diastolic and not systolic cardiac arrest.
Systolic
The systolic pressure is measured at the first Karotkoff sound (stage I), it is the first tapping noise that you hear with a stethoscope when taking a manual blood pressure.
diastolic pressure
it calms you and causes your blood to slow down.
Ideally ... the first sound is the systolic pressure, and the loudest sound is the diastolic. Note that both are artifacts of turbulence, since smooth flow is soundless.
Diastolic is more likely to be due to a real problem, where systolic may be harmless. However, there's no rule about which is worse...they have different possible causes, both bad and not so bad.
what causes sound when you speak
it is systolic I remember it by Lub-Dub like clapping your hands.