Normal adult diastolic blood pressure is generally:

• A. 65-85 mm Hg diastolic
• B. 60-85 mm Hg diastolic
• C. 60-80 mm Hg diastolic
• D. 70-90 mm Hg diastolic

Answer: (C)

Normal diastolic blood pressure reflects the arterial pressure when the heart is resting between beats. In a healthy adult, this resting pressure typically falls around 60 to 80 mm Hg, which is high enough to keep organs well perfused during diastole but not so high that it strains the vessels over time. That’s why the range 60-80 mm Hg is considered the standard normal for the diastolic number. Values above this, especially above about 80, can indicate elevated cardiovascular risk if persistent, while values much below 60 can signal hypotension and reduced perfusion.