Ask the doctor: Should I worry about my low diastolic pressure?

The decrease in your diastolic blood pressure probably represents age-related stiffening of your arteries. This means that more of the blood in the aorta and its main branches is forced into other smaller blood vessels every time the heart beats. With less blood in the arteries between heartbeats, the diastolic pressure, which measures the pressure in the arteries between beats, becomes lower.
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