What is the normal range for diastolic blood pressure?
May 23, 2022
Source: Cainiu Health
Dr. Li Man
Introduction
Low blood pressure refers to diastolic pressure, which normally ranges between 60–90 mmHg. The diagnostic criteria for hypertension require a minimum of three blood pressure measurements taken on the same day, with systolic pressure ≥140 mmHg and/or diastolic pressure ≥90 mmHg. Hypotension is defined as systolic pressure <90 mmHg and diastolic pressure <60 mmHg.
With improvements in living standards, an increasing number of people are experiencing high blood pressure. While hypertension has traditionally been more common among middle-aged and elderly individuals, it is now becoming increasingly prevalent among younger populations. Not only does it cause harm to physical health, but it also adversely affects daily life and work performance. Understanding this condition is essential for effective prevention and treatment. So, what is the normal range for diastolic (low) blood pressure?
What Is the Normal Range for Diastolic Blood Pressure?
Diastolic pressure—also known as “low” pressure—is considered normal when it falls between 60 and 90 mmHg. The diagnostic criteria for hypertension require at least three separate measurements taken on the same day, with systolic pressure ≥140 mmHg and/or diastolic pressure ≥90 mmHg. Conversely, hypotension is defined as systolic pressure <90 mmHg and diastolic pressure <60 mmHg. Therefore, the normal blood pressure range lies between these two thresholds—specifically, a diastolic pressure of 60–90 mmHg.
However, current hypertension guidelines further categorize blood pressure levels into “optimal blood pressure,” “normal blood pressure,” and “high-normal blood pressure.” Optimal (ideal) diastolic pressure falls within the range of 70–80 mmHg. A reading of 80–84 mmHg—or up to 84 mmHg—is generally considered normal, while the upper limit of the normal range is 85–89 mmHg. Additionally, other hypertension management guidelines recommend maintaining diastolic pressure above 70 mmHg, with the ideal target range being 70–80 mmHg.
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