Definitions for "DIASTOLIC BLOOD PRESSURE"
Referring to the blood pressure at its lowest point when the heart is in a period of relaxation between beats. In a blood pressure reading, the diastolic pressure is the second number recorded. For example, with a blood pressure of 120/80 ("120 over 80"), the diastolic pressure is 80.
The optimal blood pressure reading currently is 115/75. 59 The "75", the second number, is the Diastolic Blood Pressure---the amount of pressure in your arteries when your heart is at rest between beats. See Systolic Blood Pressure.
When taking blood pressure, it is the lower number, representing the amount of pressure when the heart is relaxed.