It is best practice to check blood pressure (BP) in both arms at least once. Generally, the right arm tends to have a slightly higher reading than the left, but differences of 5 points or less in systolic blood pressure are normal.
Why Check Both Arms?
- Variations: Blood pressure can differ slightly between arms due to natural variations in blood flow.
- Baseline: Checking both arms helps establish a baseline and determine if a consistent difference exists between the two.
How to Measure BP in Each Arm
- Preparation: Sit comfortably with your arm supported at heart level.
- Initial Measurement: Take a blood pressure reading in one arm, noting both systolic and diastolic values.
- Second Measurement: Take a measurement in the other arm, also noting both readings.
- Comparison: Compare readings from both arms. If there is a significant difference (more than 10 points), consult your healthcare provider.
Which Arm to Use Regularly
- Typical Choice: After the initial dual-arm reading, use the arm with the higher reading for future measurements.
- Consistency: Using the same arm regularly ensures consistency in your blood pressure tracking.
When To See A Doctor
- Significant Difference: If there’s a difference of more than 5-10 points of systolic pressure between your arms, consult your doctor.
- Unusual Readings: Consult your doctor for any consistently high or concerning blood pressure readings.
| Action | Details |
|---|---|
| Initial Check | Measure BP in both arms. |
| Normal Difference | Systolic reading varies by 5 points or less between arms. |
| Regular Monitoring | Use the arm with higher reading for consistent checks, once difference is established. |
| Significant Difference | Consult a healthcare provider if the difference exceeds 5-10 points in systolic pressure |
