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[Correspondence] Measurement of cardiac troponin for exclusion of myocardial infarction

Anoop Shah and colleagues1 report that an ARCHITECTSTAT high-sensitivity cardiac troponin I (hs-cTnI) of less than 5 ng/L at presentation would identify two-thirds of patients with suspected acute coronary syndrome as being at low risk of cardiac events (negative predictive value of 99·6%) who could be discharged. The authors acknowledge that this requires evaluation in clinical practice.