Comparison of QTc and Troponin Levels in ST Elevation MIs Compared with Non-ST Elevation MIs.

Objectives: ST elevation myocardial infarctions (STEMIs) and non-ST elevation myocardial infarctions (NSTEMIs) have differences that can be important to differentiate. Our primary hypothesis was that corrected QT (QTc) duration and troponin I levels were higher in STEMIs compared with NSTEMIs. The objective of our study was to compare STEMIs with NSTEMIs for QTc duration and troponin levels.

The meaning of elevated troponin I levels: not always acute coronary syndromes.

Background: Troponin elevation can be caused by etiologies other than acute coronary syndromes (ACS). Our hypothesis was that elevated troponins occur more frequently in non-ACS cases but that ACS cases (type 1 ST-elevation myocardial infarction [STEMI] and type 1 non-STEMI [NSTEMI]) have significantly higher troponin elevations.

Methods: This was a cross-sectional cohort analysis of a random subset of all patients with elevated troponins (defined as ≥0.