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Information and advice on heart conditions & stroke disease, everything from prevention to illness for your wellbeing.
Read our glossary of related words with definitions by clicking on the alphabet below.
Heart Index - D
Diastole
The period of relaxation and dilation of the chambers of the heart in between contractions of heart muscle.
Diastolic blood pressure
The lower of the two readings recorded when measuring blood pressure. It reflects the pressure exerted by the blood when the heart relaxes.
