The Fast and the Furious: Low-Risk Chest Pain and the Rapid Rule-Out Protocol

Accelerated diagnostic pathways (ADP) have been designed to identify low-risk chest pain patients in the emergency department. This review article discusses the Asia-Pacific Evaluation of Chest Pain Trial (ASPECT) score, the Accelerated Diagnostic Protocol for Chest Pain Trial (ADAPT) score, the Emergency Department Assessment of Chest Pain Score (EDACS), the HEARTScore and the HEART pathway. These ADPs have been validated in various studies and aid the emergency provider with identifying the low-risk chest pain patient who is appropriate for discharge home, while at the same time highlighting those patients who would benefit from further in-patient work up. These approaches should be paired with patient input and shared decision-making strategies. [West J Emerg Med. 2017;18(3)474-478.

Diagnostic Performance of High Sensitivity Cardiac Troponin T Strategies and Clinical Variables in a Multisite United States Cohort

Background: European data support the use of low high-sensitivity troponin (hs-cTn) measurements or a 0/1-hour (0/1-h) algorithm for myocardial infarction (MI) or to exclude major adverse cardiac events (MACE) among Emergency Department (ED) patients with possible acute coronary syndrome (ACS). However, modest US data exist to validate these strategies. This study evaluated the diagnostic performance of an initial hs-cTnT measure below the limit of quantification (LOQ: 6 ng/L), a 0/1-h algorithm, and their combination with HEART scores for excluding MACE in a multisite US cohort. Methods: A prospective cohort study was conducted at 8 US sites, enrolling adult ED patients with symptoms suggestive of ACS and without ST-elevation on electrocardiogram. Baseline and 1-hour blood samples were collected and hs-cTnT (Roche, Basel Switzerland) measured. Treating providers blinded to hs-cTnT results prospectively calculated HEART scores. MACE (cardiac death, MI, and coronary revascularization) at 30-days was adjudicated. The proportion of patients with initial hs-cTnT measures Results: Among 1,462 participants with initial hs-cTnT measures, 46.4% (678/1,462) were women and 37.1% (542/1,462) were African American with a mean age of 57.6 (SD±12.9) years. MACE at 30-days occurred in 14.4% (210/1,462). Initial hs-cTnT measures Conclusions: In a prospective multisite US cohort, an initial hs-cTnT 99% for 30-day MACE when used alone or with a HEART score