TNNI3 and myocardial infarction: This real-world data indicates a higher imprecision with the Ortho hs-cTnI assay (i.e., imprecision as assessed via the coefficient of variation; CV) which may limit its use for sites using the proposed 0/1-h algorithm to assess for acute myocardial infarction as endorsed by the European Society of Cardiology guidelines [3,15,16].