To establish whether a difference in SBP between arms is associated with peripheral or cardiovascular (CV) disease, and with an increased risk of CV or.

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To establish whether a difference in SBP between arms is associated with peripheral or cardiovascular (CV) disease, and with an increased risk of CV or all-cause mortality. Objective Methods Bibliographic database search (Medline, Embase, Cochrane, and Medline databases) for studies published before July 2011, showing differences in SBP between arms and outcomes data. A random-effects meta-analysis. Background Differences in systolic blood pressure (SBP) of mm Hg or more between arms have been associated with peripheral vascular disease and attributed to subclavian stenosis. 1. Clark EC, et al. Association of a difference in systolic blood pressure between arms with vascular disease and mortality: a systematic review and meta-analysis. Lancet Jan 27, Epub ahead of print DOI: /S (11)61710.

Pooled results of five invasive studies using angiography 20 trials met inclusion criteria. The mean difference in SBP between arms was 37 mm Hg (95% CI, 35.4–38.4) for proven subclavian stenosis (>50% occlusion). A difference of 10 mm Hg or more was strongly associated with subclavian stenosis (risk ratio [RR], 8.8; 95% CI, 3.6–21.2). A difference of 15 mm Hg or more was associated with peripheral vascular disease, pre-existing cerebrovascular disease, and increased cardio vascular mortality (hazard ratio [HR], 1.7; 95% CI, 1.1–2.5) and all-cause mortality (HR, 1.6, CI, 1.1–2.3). A difference of 10 mm Hg or higher was associated with peripheral vascular disease (five studies; RR, 2.4, CI, 1.5–3.9). Pooled results of non- invasive studies 1. Clark EC, et al. Association of a difference in systolic blood pressure between arms with vascular disease and mortality: a systematic review and meta-analysis. Lancet Jan 27, Epub ahead of print DOI: /S (11)61710.

A difference in SBP of 10 mm Hg or more or 15 mm Hg or more between arms could identify patients at high risk of asymptomatic peripheral vascular disease and mortality. Findings from our study should be incorporated into future guidelines for hypertension and blood-pressure measurement to justify bilateral brachial measurement in the assessment of individuals, and to promote targeted screening for peripheral vascular disease and aggressive risk factor management in subject with a systolic between-arm difference. 1. Clark EC, et al. Association of a difference in systolic blood pressure between arms with vascular disease and mortality: a systematic review and meta-analysis. Lancet Jan 27, Epub ahead of print DOI: /S (11)61710.