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Systole is the top number of a blood pressure reading. It is the heart contracting forcing blood out. Indicated by the first heart sound. Diastole is the bottom number of a blood pressure reading. It is the heart relaxing bringing blood back in.

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15y ago
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9y ago

Systolic blood pressure is a measurement of the pressure on blood vessels as the heart is contracting. It is higher than that of the diastolic blood pressure, which is the measurement of the pressure on vessels as the heart relaxes and refills.

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14y ago

Systolic pressure is the highest pressure in the arteries after ventricular contraction. A normal value for that would be about 120 mmHg.

Diastolic pressure is the lowest pressure in the arteries just before the next contraction of the left ventricle. A normal value for that would be about 80 mmHg.

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9y ago

Diastolic, the bottom number in a blood pressure reading, is the pressure in the arteries between heartbeats. Systolic, the top number in a blood pressure reading, is the pressure in the arteries when the heart beats.

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14y ago

Systolic is the force with which blood is pushing against arterial walls during ventricular contraction whereas diastolic represents the force exerted by the blood remaining in arteries during ventricular relaxation.

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13y ago

What does the BP numbers mean?

The number on the top is the systolic blood pressure and the number on the bottom is the diastolic blood pressure. The systolic BP is the pressure in the arteries right when the blood is pumped out of the heart, therefore the pressure is bigger. The diastolic BP is the pressure in the arteries after the blood has been pumped out and before the next heart contraction. At this moment, the heart is relaxed and the pressure is much lower.

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14y ago

The systolic pressure is the blood pressure in the arteries during contraction of the ventricles.

Diastolic pressure is the blood pressure that remains between heart contractions. :)

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Q: What is the systolic and diastolic?
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