Fig 1.
The median time to cTnI measurement from the time of onset of recent symptoms was 10.8 hours (IQR 4.4, 24.5 hours). Only one patient was diagnosed with NSTEMI based on high first TnI value and was hospitalized. The reminder did not suffer 30-day MACE. The median emergency department length of stay for these patients was 4 hours (IQR 3, 5 hours).
Table 1.
Patient characteristics.
Table 2.
15-Day Major Adverse Cardiac Events (MACE)–N = 1,683.
Table 3.
Demographics for patients with Major Adverse Cardiac Events (MACE) at 15 days.
Fig 2.
Classification of Patients based on Two or Three Serial Troponin Values and their 15-day Outcomes.
*Based on troponin values, first and second troponin measurements 3-hours part †Current median ED length of stay for the 1,346 patients is 7 hours (IQR 6, 8) ‡Two patients died in-hospital due to NSTEMI §Difference between the first and third troponin values.
Table 4.
Characteristics, management and outcomes for the three Ottawa Troponin Pathway groups.
Fig 3.
The Ottawa Troponin Protocol*.
*For use with Siemens Vista Conventional Troponin I assay † Difference between the first and third troponin values.
Table 5.
Diagnostic performance of the Ottawa Troponin Pathway and its components.
Table 6.
Secondary outcomes among study patients–N = 1,683.