What is the recommendation for measuring cardiac biomarkers in patients presenting with symptoms consistent with ACS?
The recommendations from this section are that cardiac-specific troponin (troponin I or T when a contemporary assay is used) levels should be measured at presentation and 3 to 6 hours after symptom onset in all patients who present with symptoms consistent with ACS to identify a rising and/or falling (Level of Evidence: A). In addition, additional troponin levels should be obtained beyond 6 hours after symptom onset in patients with normal troponins on serial examination when electrocardiographic changes and/or clinical presentation confer an intermediate or high index of suspicion for (Level of Evidence: A). If the time of symptom onset is ambiguous, the time of presentation should be considered the time of onset for assessing troponin values.67,68,72 (Level of Evidence: A).