Copeptin for rapid rule out of acute myocardial infarction in emergency department

Abstract Background Copeptin, in combination with conventional troponin (cTn), has been suggested as a means of rapid rule out of the diagnosis of acute myocardial infarction (AMI). This study aims to assess the value of copeptin for rule out of AMI, according to the pre-test probability (PTP). Methods In a prospective multicentric study, we enrolled patients presenting into emergency departments with chest pain Results 317 patients were included: 148 (46%) had low, 110 (35%) moderate and 59 (19%) high PTP. Final diagnosis was AMI in 45 patients (14%). Median copeptin level was higher in AMI patients compared with that in patients having other diagnoses (23.2 vs. 9.9pmol/L, p=0.01). A copeptin level ≥10.7pmol/L in combination with cTnI detected AMI with higher sensitivity than for cTnI alone (98 [87–100] vs. 71 [55–83] %, p=0.001), whatever the PTP. The negative predictive value of the combination copeptin+cTnI was increased, compared to that of cTnI alone (99 [97–100] vs. 95 [92–97] %, p Conclusions In triage of chest pain patients, the additional use of copeptin with conventional cTnI might allow a rapid and reliable rule out of the diagnosis of AMI regardless of the PTP.