Blood pressure is the force of blood pushing against the artery walls as the heart pumps it throughout the body. A specific reading, such as 108/67 millimeters of mercury (mm Hg), prompts questions about overall health. This reading is a snapshot of your cardiovascular function, and understanding it requires context. This article clarifies what 108/67 means according to current health standards.
Understanding Systolic and Diastolic Pressure
A blood pressure reading is always given as two numbers, representing distinct phases of the heart’s cycle. The top number, systolic pressure, measures the force exerted when the heart contracts and pushes blood out. This is the peak pressure within the arteries. The bottom number, diastolic pressure, measures the force when the heart rests between beats, representing the lowest pressure as the chambers refill.
Interpreting 108/67: The Standard Classifications
A reading of 108/67 mm Hg falls into the most favorable classification based on guidelines from organizations like the American Heart Association (AHA). This reading is considered squarely within the “Normal” or “Healthy” blood pressure range for adults. Normal classification requires the systolic pressure to be less than 120 mm Hg and the diastolic pressure to be less than 80 mm Hg. This category suggests the heart and arteries are operating under optimal pressure conditions. Beyond the Normal range, blood pressure is categorized into several levels based on increasing numerical thresholds.
- Elevated blood pressure: Systolic pressure between 120 and 129 mm Hg, with diastolic pressure below 80 mm Hg. This stage suggests lifestyle changes may be necessary.
- Stage 1 Hypertension: Defined by a systolic pressure between 130 and 139 mm Hg, or a diastolic pressure between 80 and 89 mm Hg.
- Stage 2 Hypertension: Assigned when the systolic pressure is 140 mm Hg or higher, or the diastolic pressure is 90 mm Hg or higher. This level indicates a more severe condition.
- Hypertensive Crisis: The systolic pressure exceeds 180 mm Hg and/or the diastolic pressure exceeds 120 mm Hg, requiring immediate medical attention.
Why Blood Pressure is Not a Single Number
While 108/67 is numerically ideal, blood pressure is a dynamic measure that fluctuates constantly throughout the day. A single reading does not represent a fixed, lifelong value. Many common, temporary factors can significantly influence the result, making consistent monitoring essential to establish a true baseline pressure.
Environmental and Physiological Factors
Stress or anxiety can cause a temporary spike in pressure, a phenomenon sometimes referred to as “White Coat Syndrome” when it occurs in a clinical setting. Consuming substances like caffeine or nicotine in the 30 minutes before a measurement can also temporarily elevate both systolic and diastolic numbers.
Measurement Technique Errors
Even small errors in technique can alter the reading. For example, an unsupported back or arm, or having crossed legs, can artificially increase the measurement. Talking during the test has been shown to raise the systolic pressure by 10 to 15 mm Hg. These variables underscore why proper technique is necessary.
Actionable Advice: When to Talk to a Healthcare Provider
Although 108/67 is excellent, obtaining consistent readings over time is the most accurate way to monitor cardiovascular health. If tracking pressure at home, aim to take measurements at the same time each day, such as first thing in the morning, to minimize external variables.
Consult a healthcare provider if you notice a consistent pattern of readings significantly higher or lower than your normal range. While high pressure is a concern, consistently low readings (typically below 90/60 mm Hg) accompanied by symptoms like dizziness, lightheadedness, or fainting also warrant a medical discussion. Ultimately, the interpretation of any reading must be considered alongside your personal health history, age, medical conditions, and current medications.