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A Prospective Evaluation of Clinical HEART Score Agreement, Accuracy, and Adherence in Emergency Department Chest Pain Patients.

STUDY OBJECTIVE: The HEART score is a risk stratification aid that may safely reduce chest pain admissions for emergency department patients. However, differences in interpretation of subjective components potentially alters the performance of the score. We compared agreement between HEART scores determined during clinical practice with research-generated scores and estimated their accuracy in predicting 30-day major adverse cardiac events.

METHODS: We prospectively enrolled adult ED patients with symptoms concerning for acute coronary syndrome at a single tertiary center. ED clinicians submitted their clinical HEART scores during the patient encounter. Researchers then independently interviewed patients to generate a research HEART score. Patients were followed by phone and chart review for major adverse cardiac events. Weighted kappa; unweighted Cohen's kappa; prevalence-adjusted, bias-adjusted kappa (PABAK); and test probabilities were calculated.

RESULTS: From November 2016 to June 2019, 336 patients were enrolled, 261 (77.7%) were admitted, and 30 (8.9%) had major adverse cardiac events. Dichotomized HEART score agreement was 78% (kappa 0.48, 95% confidence interval [CI] 0.37 to 0.58; PABAK 0.57, 95% CI 0.48 to 0.65) with the lowest agreement in the history (72%; WK 0.14, 95% CI 0.06 to 0.22) and electrocardiogram (85%; WK 0.4, 95% CI 0.3 to 0.49) components. Compared with researchers, clinicians had 100% sensitivity (95% CI 88.4% to 100%) (versus 86.7%, 95% CI 69.3% to 96.2%) and 27.8% specificity (95% CI 22.8% to 33.2%) (versus 34.6%, 95% CI 29.3% to 40.3%) for major adverse cardiac events. Four participants with low research HEART scores had major adverse cardiac events.

CONCLUSION: ED clinicians had only moderate agreement with research HEART scores. Combined with uncertainties regarding accuracy in predicting major adverse cardiac events, we urge caution in the widespread use of the HEART score as the sole determinant of ED disposition.

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