The lower figure in a blood pressure reading. It is the pressure when the ventricles are relaxed and refilling. It is measured in millimetres of mercury. For example, in a measurement of 120 over 80, the diastolic pressure is 80.
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Diastolic: Referring to the time when the heart is in a period of relaxation and dilatation (expansion). The noun for diastolic is diastole. (The final letter in 'diastole' is pronounced as a long 'e' as in 'lee.') The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the ventricles of the heart wh... Found on http://www.medterms.com/script/main/art.asp?articlekey=16164
The bottom number of a blood pressure reading. The diastolic reading measures blood pressure when the heart is resting or relaxing in between beats. A good, healthy reading is 20. Broader term(s): Blood Pressure Found on http://www.pregnology.com/Pregnancy-dictionary/