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Blood pressure differences between arms may be more frequent than previously estimated and could indicate underlying peripheral vascular disease.
EDITOR—I believe that McAlister and Straus underestimate the frequency and significance of a blood pressure difference between the arms.1 They quote 6% from the paper by Harrison et al, but this group reported a difference in 10/131 (that is, 7.6%) normotensive subjects for systolic or diastolic differences, 44/310 hypertensive patients (14%) for a systolic difference, and 31/310 hypertensive patients (10%) for a diastolic difference.2 I have reviewed the English language literature and identified 11 studies with comparable data on at least 100 subjects. These …
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Christopher E Clark (2001) studied this question.
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