Population
610 ambulatory patients seen at a university hospital emergency department
Design
Cross-sectional
Authors
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Interarm BP differences >10 mm Hg are common and may reflect normal variation; leaves open whether current thresholds for aortic pathology require prospective validation.
Bilateral upper-extremity blood pressure measurements have a wide degree of normal interarm variation, with over half of patients having a difference >10 mm Hg, which should be considered when evaluating for conditions like aortic dissection.
Adam J. Singer (1996) studied this question.
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