what does diastolic blood pressure measure

Diastolic blood pressure measures how much pressure your blood is putting on your artery walls when your heart is relaxed and filling with blood between beats.

Quick Scoop: The Simple Answer

When you see a blood pressure like 120/80, the bottom number (80) is the diastolic pressure.

It represents:

• The pressure in your arteries while the heart muscle is resting between beats (the “refill” phase).

• How much resistance your blood vessels offer even when the heart is not actively squeezing.

• A clue to how stiff or relaxed your artery walls are over time.

Think of one heartbeat as a two-part story:

• Systolic = the “squeeze” and push of blood out.
• Diastolic = the “rest” while the heart refills, but the arteries are still under steady pressure.

A Bit More Detail (In Plain Language)

• Diastolic pressure is lower than systolic because the heart is not actively pumping at that moment.

• It is still important: consistently high diastolic readings can signal high blood pressure (hypertension) and increased cardiovascular risk.

• Normal adult diastolic is generally below 80 mmHg; 80–89 mmHg can be considered stage 1 hypertension, and 90 or more stage 2, depending on guidelines.

Tiny Example

If your reading is 118/76 mmHg:

• 118 = systolic (pressure during the heartbeat).
• 76 = diastolic (pressure between beats, while the heart rests and fills).

Mini FAQ

Is diastolic less important than systolic?
No—both numbers matter for assessing heart and blood vessel health, and high values in either can increase risk over time.

Why should I care about it?
Because it reflects the constant “background” pressure your arteries live under all day, which affects their long-term health.

Information gathered from public forums or data available on the internet and portrayed here.