The pulmonary embolism rule-out criteria (PERC; Table 1) rule was created to exclude pulmonary embolism (PE) without further examinations, by selecting patients with very low pretest probability (< 2%). Its clinical usefulness is currently not confirmed in European studies with high PE prevalence, even when combined with low clinical probability assessed by revised Geneva score. Our objective was to compare the performances of PERC rule combined with low clinical probability assessed by revised Geneva score, Wells score, or the clinician gestalt in a European population with a high prevalence of PE.
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© 2011 Published by Elsevier Inc.