P1735Two-hour algorithm for early diagnosis of acute myocardial infarction using a novel high-sensitivity cardiac troponin I assay

Abstract Background We aimed to derive and externally validate a 0/2h-algorithm using the novel high-sensitivity cardiac troponin I (hs-cTnI-Access) assay. Methods We enrolled patients presenting to the emergency department with symptoms suggestive of acute myocardial infarction (AMI) in two prospective chest pain trials. Two independent cardiologists adjudicated the final diagnosis including all available medical information including cardiac imaging. Hs-cTnI concentrations were measured at presentation and after 2h. Primary diagnostic endpoint was the derivation and validation of an hs-cTnI-Access specific 0/2h-algorithm. Primary prognostic endpoint was overall survival of patients after 30- and 720-days of follow-up. Results AMI was the adjudicated final diagnosis in 164/1131 (14.5%) patients in the derivation and in 88/1280 (6.9%) patients in the validation cohort. Median hs-cTnI Access concentrations at presentation were significantly higher in patients with AMI as compared to patients with non-AMI in both cohorts (104 ng/L versus 3.4 ng/L and 29 ng/L vs. 2.3 ng/L, p-value both