Evaluation of hsTnI in the Management of Patients With Chest Pain in the Emergency Department

Current standard of care algorithm using high sensitivity troponin T (hsTnT) requires up to 6.5 hours to diagnose an ACS. Data will be stratified based upon time of symptom onset and gender. A health economics and outcome model will be applied using the optimal high sensitivity troponin I (hsTnI) cut-off values and draw times to determine the cost and outcome benefits predicted from optimal utilization of hsTnI. A chest pain registry will be set up to compare high sensitivity troponin I (hsTnI) versus high sensitivity troponin T (hsTnT) for all patients who present to the emergency department and require a blood draw. The outcomes of these patients will be tracked over the study period. The purpose of conducting this study evaluation is: 1. To shorten the chest pain protocol for suitable patients to \< 3 hours compared to the current 6 hours protocol with the latest high sensitivity Troponin I assays. 2. To determine the validity of Abbott ARCHITECT i2000 and Beckman Coulter ACCESS AccuTnI+3 with an accelerated algorithm in comparison to the standard of care acute coronary syndrome (ACS) algorithm and high sensitivity troponin T (hsTnT) assay, to rule-out or rule-in for an ACS within 3 hours of presentation to the emergency room (ER) with isolated suspected ACS. 3. To establish the local reference norms for hsTnI assays.