RT Journal Article SR Electronic T1 Prehospital risk stratification in patients with chest pain JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP emermed-2020-210212 DO 10.1136/emermed-2020-210212 A1 Dennis Sagel A1 Pieter Jan Vlaar A1 Radboud van Roosmalen A1 Ingmar Waardenburg A1 Wybe Nieuwland A1 Roelof Lettinga A1 Robert van Barneveld A1 Edward Jorna A1 Roelof Kijlstra A1 Carien van Well A1 Antoon Oomen A1 Louis Bartels A1 Rutger Anthonio A1 Vincent Hagens A1 Sjoerd Hofma A1 Youlan Gu A1 Derk Drenth A1 Ryanne Addink A1 Thea van Asselt A1 Peter van der Meer A1 Eric Lipsic A1 Luis Juarez Orozco A1 Pim van der Harst YR 2021 UL http://emj.bmj.com/content/early/2021/08/08/emermed-2020-210212.abstract AB Objectives The History, ECG, Age, Risk Factors and Troponin (HEART) Score is a decision support tool applied by physicians in the emergency department developed to risk stratify low-risk patients presenting with chest pain. We assessed the potential value of this tool in prehospital setting, when applied by emergency medical services (EMS), and derived and validated a tool adapted to the prehospital setting in order to determine if it could assist with decisions regarding conveyance to a hospital.Methods In 2017, EMS personnel prospectively determined the HEART Score, including point-of-care (POC) troponin measurements, in patients presenting with chest pain, in the north of the Netherlands. The primary endpoint was a major adverse cardiac event (MACE), consisting of acute myocardial infarction or death, within 3 days. The components of the HEART Score were evaluated for their discriminatory value, cut-offs were calibrated for the prehospital setting and sex was substituted for cardiac risk factors to develop a prehospital HEART (preHEART) Score. This score was validated in an independent prospective cohort of 435 patients in 2018.Results Among 1208 patients prospectively recruited in the first cohort, 123 patients (10.2%) developed a MACE. The HEART Score had a negative predictive value (NPV) of 98.4% (96.4–99.3), a positive predictive value (PPV) of 35.5% (31.8–39.3) and an area under the receiver operating characteristic curve (AUC) of 0.81 (0.78–0.85). The preHEART Score had an NPV of 99.3% (98.1–99.8), a PPV of 49.4% (42.0–56.9) and an AUC of 0.85 (0.82–0.88), outperforming the HEART Score or POC troponin measurements on their own. Similar results were found in a validation cohort.Conclusions The HEART Score can be used in the prehospital setting to assist with conveyance decisions and choice of hospitals; however, the preHEART Score outperforms both the HEART Score and single POC troponin measurements when applied by EMS personnel in the prehospital setting.Data are available on reasonable request. All deidentified data can and will be shared on a written reasonable request.