A small, British study has revealed that interarm differences in systolic blood pressure of 10mm Hg or more are associated with 3-4 fold greater risks of cardiovascular and cerebrovascular events including all-cause death. It is suspected that interarm differences are associated with peripheral vascular disease. This study needs to be replicated in larger studies to better understand the significance of between-arm differences.
PositiveTip: If you have more than 10 mm Hg systolic pressure difference between arms, ask your doctor what you should be doing to prevent possible serious outcomes.