A lot of us with Blood Pressure issues (or even otherwise) need to keep track of our Blood Pressure to notice any variation, and consult a doctor when necessary. Hence, home Blood Pressure monitors come in extremely handy when it comes to keeping track of our Blood Pressure. However, even though these digital Blood Pressure machines are quite accurate, it is important to use them the right way, as the wrong way can lead to false reading, thus building up stress. Dr Evan Levine, a Board Certified Cardiologist, reveals how arm placement matters when it comes to Blood Pressure readings…


Why arm position matters
According to Dr Levine, proper arm placement is needed for the right blood pressure reading. The American Heart Association, says that one must always make sure the arm is supported, relaxed and at heart level, when taking a blood pressure reading. If the arm is not at heart level or is unsupported, gravity and muscle tension can increase, or decrease the pressure in the arteries, leading to misleading results.

Overestimation: Arm too low or unsupported
If the arm hangs at the side, or rests in your lap during the measurement, studies show that blood pressure readings are consistently higher than if the arm is supported at heart level. A 2024 study in JAMA Network found that the arm on the lap made systolic pressure read 4 mm Hg higher, while the arm hanging at the side made the readings even higher.

Underestimation: Arm too high
On the other hand, if the arm is above the heart level, the pressure in the arteries drops, and the blood pressure reading records lower than the blood pressure. This can lead to a misdiagnoses, and delay in treatment.


The right technique
Dr Levine says that arm position can alter the reading, regardless in any body position. Studies in emergency and ambulatory settings found that changing arm positions-parallel or perpendicular to the ground—can greatly affect the measured blood pressure, particularly when assessing for conditions like orthostatic hypotension. Several studies have shown that changing the arm position on purpose, can cause an interpretation of blood pressure changes, in situations.

Preventing misdiagnosis
Small changes in measurement technique can have big consequences. Overestimating blood pressure may lead to an incorrect diagnosis of hypertension and unnecessary medications, with their own side effects and costs.

How to take your Blood Pressure at home

• • Sit quietly for five minutes, keep the back straight, with feet on the floor.
• • Support the measured arm at heart level on a table or armrest. Keep the measured arm stable.
• • Use a validated, properly-sized cuff
• • Stay still and avoid talking during the reading.

Sticking to the basics-relaxed arm, supported at heart level-can make all the difference in getting blood pressure readings that truly reflect your heart health, supported by strong evidence from clinical research and global health guidelines.