Association Between Tp-e/QT Ratio And Prognosis In Patients With ST-Segment Elevation Myocardial Infarction After Percutaneous Coronary Intervention

Objective: To investigate the association between Tp-e/QT ration andthe prognosis in patients with ST-segment elevation myocardial infarction(STEMI) after percutaneous coronary intervention (PCI).Methods:118patients with STEMI were included, all of whom weretreated by a successful PCI. The Tp-e interval and QT interval were measuredby electrocardiograms pre-PCI. Tp-e/QT ratio was calculated.Results:41(34.7%) patients had a Tp-e/QT ratio≥0.25. They sufferedelevated rates of both in-hospital death (22.7%vs1.8%, P<0.001) and mainadverse cardiac events (MACE)(45.9%vs17.1%, P<0.005), compared withpatients with a Tp-e/QT ratio <0.25. After discharge, comparing withTp-e/QT ratio <0.25, Tp-e/QT ratio≥0.25remained as an independentpredictor of all-cause death (37.6%vs3.9%, P<0.001) and cardiac death(32.8%vs3.8%, P<0.001).Conclusions: The Tp-e/QT ratio may act as a predictor of adverseoutcomes after PCI treatment in STEMI patients.