A single high sensitivity cardiac troponin T (hs-cTnT) measurement less than the limit of quantitation (the lowest reportable concentration) appears to be sufficient in ruling out acute MI in a low risk population.
Rapid Exclusion of Acute Myocardial Injury and Infarction With a Single High-Sensitivity Cardiac Troponin T in the Emergency Department: A Multicenter United States Evaluation. Circulation. 2022 Jun 7;145(23):1708-1719. doi: 10.1161/CIRCULATIONAHA.122.059235. Epub 2022 May 10.