To establish the feasibility and accuracy of HEART score and POC testing in the prehospital setting the investigators propose a quality surveillance study of a limited implementation of the HEART score with POC troponin testing. This pilot will include paramedics from three demographically distinct counties (Forsyth, Surry, and Stokes counties) in North Carolina, who will begin using the HEART score and i-STAT POC Troponin as part of their risk assessment for patients with acute chest pain. However, EMS triage and transportation plans will not be altered based on the HEART score assessment until feasibility and accuracy have been established. To ensure the feasibility and accuracy of paramedic chest pain risk assessment the investigators will be performing surveillance of electronic health records (EHR) and contacting patients by phone (which is a common practice in EMS quality assurance). Quality surveillance participants (n=500) will be identified retrospectively and quality assurance data will be collected electronically using EHR (EMS records, and Wake Forest Baptist Health health records) and via telephone follow-up calls (which are customary in EMS quality assurance projects).