diastolic pressure n.
The lowest arterial blood pressure reached during any given ventricular cycle.
The diastolic pressure has been estimated to be about 35 to 45 mm.
The minimum pressure in the artery, the pressure at the end of diastole, is called the diastolic pressure.
It can only be determined by measuring both the systolic and diastolic pressure.
We know that when the pulse rate is constant, vasodilatation causes a fall in diastolic pressure and a rise in pulse pressure.
It is characteristic of all cases of aortic insufficiency that the diastolic pressure is low, even as low as 30 mm.
On the contrary, vasoconstriction causes a rise in diastolic pressure and a fall in pulse pressure.
Usually there is no difficulty in determining the diastolic pressure.
Others held that the diastolic pressure should be read at the fifth phase, the absence of all sound.
In other words the systolic pressure is always increased to greater degree than the diastolic pressure.
The diastolic pressure is not very variable; it is not subject to the same influences which disturb the systolic pressure.