Diastolic blood pressure is defined as

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Multiple Choice

Diastolic blood pressure is defined as

Explanation:
Diastolic blood pressure is the arterial pressure during ventricular diastole, the phase when the heart is relaxing and filling with blood. This is the lower, or bottom, number in a blood pressure reading, because pressure in the arteries is lowest when the heart is not actively contracting. The higher number, systolic pressure, reflects the pressure during ventricular contraction when the heart pumps blood. Mean arterial pressure is a separate calculation that estimates the average arterial pressure over the cardiac cycle, not simply the diastolic value. So identifying diastolic pressure as the bottom number correctly captures its meaning.

Diastolic blood pressure is the arterial pressure during ventricular diastole, the phase when the heart is relaxing and filling with blood. This is the lower, or bottom, number in a blood pressure reading, because pressure in the arteries is lowest when the heart is not actively contracting. The higher number, systolic pressure, reflects the pressure during ventricular contraction when the heart pumps blood. Mean arterial pressure is a separate calculation that estimates the average arterial pressure over the cardiac cycle, not simply the diastolic value. So identifying diastolic pressure as the bottom number correctly captures its meaning.

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