Value of c Tpeak –Tend \ c QT Ratio in the Prediction of No-reflow in Acute ST-Elevation Myocardial Infarction

Abstract

Background: The occurrence of no-reflow in patients with STEMI means inadequate myocardial reperfusion despite patent coronary arteries . Electrocardiogram (ECG) is a widely available non-invasive diagnostic tool in daily practice that is easy to use. So our study aimed to evaluate the corrected value of T wave peak interval to end terminal (cTPE) and corrected QT and assess the ratio of cTPE\ c QT in predicting no-reflow. Methods: A total of 120 patients who fulfilled inclusion and exclusion criteria were subjected to 12 leads surface ECG, TPE interval was measured from the peak of the T wave to the end terminal of the T wave tangent to the baseline in the leads the least ST changes (defined as less than <0.055 mV from the isoelectric line. QT interval was assessed from the onset of the QRS complex to the T wave end, other clinical and angiographic data were compared in successful and no-reflow groups. Results: The population study was divided into no-reflow group I accounting for 33.3% and successful reperfusion group II accounting for 66.7%. Admission time cTPE\ cQT was prolonged in group I 0.281±1.94 compared to 0.192±1.07 in group II. Multivariate analysis showed that admission time from symptoms onset to hospital admission (0.017), followed by Hs-troponin peak value pg\ml (0.007), then Admission time cTPE\ cQT (0.001) were significant predictors of impaired flow TIMI <3 . Conclusion: Admission time cTPE\ cQT at a cut-off value ≥ 0.243 ms could accurately predict impaired flow TIMI <3 post PCI.