Commonly used arm positions can substantially overestimate blood pressure readings, study finds

Arm Position Affects Blood Pressure Accuracy: Commonly used arm positions during blood pressure screenings can significantly overestimate readings, potentially resulting in misdiagnosed hypertension.

Study Findings on Arm Positions: Measurements taken with the arm supported on a lap overestimated systolic pressure by nearly 4 mmHg, while an unsupported arm at the side overestimated systolic pressure by nearly 7 mmHg.

Clinical Guidelines Emphasize Proper Support: Guidelines recommend measuring blood pressure with the arm supported on a desk or table to ensure accuracy, with the middle of the cuff at heart level.

Potential Impact on Hypertension Diagnosis: Overestimated blood pressure readings could change the classification from normal to elevated or hypertensive, affecting treatment decisions.

Recommendations for Patients and Clinicians: Clinicians should adhere to best practices for measuring blood pressure, and patients should ensure proper arm support when measuring blood pressure at home.