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https://www.ahajournals.org/doi/full/10.1161/circulationaha.111.023697#:~:text=Previously%2C%20clinicians%20often%20had%20to%20wait%20an%20average,2%20to%203%20hours%20can%20be%20highly%20informative.
https://pubmed.ncbi.nlm.nih.gov/23063209/
For rule-in a 3-hour protocol performed as well as a 6-hour protocol, with a significantly (p<0.0001) better performance of absolute (AUC 0.851 vs. 0.845, p=0.740) as compared to relative concentration changes (AUC 0.771 vs. 0.739, p=0.169). Conclusions: Rule-in and rule-out of non-STEMI may be accomplished comparably effective at 3 or 6h. For rule-in, absolute …
https://rebelem.com/high-sensitivity-troponin-testing/
Most recent guidelines from Global Task Force state Tn testing should be obtained at admission and at 3 – 6 hours after admission, irrespective of the timing of the onset of symptoms [2] Lower sensitivity Tn requires at least 6 hours between time of initial lab and repeat Tn to see a conclusive increase to rule in AMI [1]
https://www.acc.org/latest-in-cardiology/journal-scans/2021/04/01/15/07/high-sensitivity-cardiac-troponin
This is in comparison to standard care testing in Scotland, which involves high-sensitivity troponin measurement at presentation and 6-12 hours later. Pathways involving shorter testing times such as the RAPID-TnT 0/1 hour trial in a much smaller patient population further decreased length of hospitalization compared to a 0/3 hour pathway, but was …
https://litfl.com/troponin-in-critical-illness/
ECG — Specific (97%) but not sensitivity (28%) Lower sensitivity troponin requires at least 6 hours between time of initial lab and repeat troponin to see a conclusive increase to rule in AMI; Serial sampling of high sensitivity tropinin at 0 and 2 hours can safely rule-out of AMI (can be discharged if TIMI 0 or 1, and normal ECG)
https://draxe.com/health/troponin-levels/
The normal range is between 0 and 0.4 ng/mL. Anything above this is considered high and potentially problematic. The higher the level, the more serious the condition is. Treatment for high troponin levels involves resolving the underlying health problem that’s causing levels to rise (heart disease, infection, etc.).
https://www.aacc.org/science-and-research/clinical-chemistry-trainee-council/trainee-council-in-english/pearls-of-laboratory-medicine/2021/high-sensitivity-cardiac-troponin
High-sensitivity assays should also have improved analytical sensitivity to detect very low troponin concentrations. Thus, a minimum of 50% of “normal” individuals above the assay’s limit of detection for both males and females is required. There are now numerous high-sensitivity troponin assays available globally.
https://www.albertahealthservices.ca/assets/wf/lab/if-lab-hp-edm-beckman-hstni-survival-guide.pdf
• For many years 0- and 6-hour conventional troponin (Tn) testing has been the standard testing practice; however, with the advent of high-sensitivity tests (hs-Tn), accelerated protocols have become widely implemented. • Rapid protocols have been adopted in EDs around the world using hs-Tn. Moreover, Calgary
https://www.ahajournals.org/doi/full/10.1161/circulationaha.111.023697
Previously, clinicians often had to wait an average of 6 hours with the lower-sensitivity, lower-precision cTn assays to see a conclusive increase in plasma cTn levels after the first troponin measurement, but today's high-sensitivity cTn tests that are separated by a mere 2 to 3 hours can be highly informative.
https://openheart.bmj.com/content/8/2/e001769
During standard care, patients had troponin measured at presentation and a repeat measurement at 6 or 12 hours from symptom onset in those considered low (<1% death at 6 months) and high risk (≥1% death at 6 months) according to the GRACE score .19 During the implementation period, patients with undetectable hs-cTnT concentrations (<5 ng/L) and …
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