Use of the QRS scoring system in the early estimation of myocardial infarct size following reperfusion

Changes of electrocardiographic and echocardiographic data after early and late mechanical recanalization of infarct-related artery with and without stent implantation

“…The present study shows that QRS score alone is not predictive of improvement in LV ejection fraction at follow-up, because echocardiographic ejection fraction increased after 3 months in the cases of early PCI, especially in the cases of early PCI with stent implantation, while there were no significant differences between the QRS scores at discharge and after 3 months. The informative value of QRS score in the acute stage of MI is undoubtedly clear (13)(14)(15), so our study also showed that myocardial injury estimated by QRS score did not increase from admission to a hospital until discharge in the cases of PCI (early or late) with stent implantation, while in the cases of PCI without the stent implantation, especially in the cases of early PCI without stent implantation, it increased.…”

“…Previous studies have shown that QRS complex is informative in the assessment of MI size and myocardial viability after reperfusion therapy (13)(14)(15). Although some authors showed that the predischarge QRS score was predictive of infarct size only in patients with completely resolved ST segment and with negative T wave (16,17), the informative value of QRS score in the acute stage of MI is undoubtedly clear.…”

T-Wave Normalization during Follow-Up After Early and Late Mechanical Recanalization of Infarct-Related Artery With and Without Stent Implantation

“…The present study shows that the QRS score alone is not predictive of improvement in LV ejection fraction at follow-up, because echocardiographic LV ejection fraction increased after 3 months in the group of early PCI, especially with stent implantation, while there were no significant differences in the QRS score comparing the data at discharge and after 3 months. However, the informative value of QRS score in the acute stage of MI was clearly shown (12,24). Our study also showed that myocardial injury estimated by the QRS score did not increase from admission to hospital until discharge in the group of PCI (early or late) with stent implantation, while in the group of PCI without stent implantation, especially in cases of early PCI, it increased.…”

“…Previous studies have shown that the QRS score is informative in the assessment of MI size and myocardial viability after reperfusion therapy (12). Although some authors showed that the predischarge QRS score was predictive of infarct size only in patients with completely resolved ST segment and with negative T wave (13), the informative value of the QRS score in the acute stage of MI is undoubtedly clear.…”

Size and transmural extent of first-time reperfused myocardial infarction assessed by cardiac magnetic resonance can be estimated by 12-lead electrocardiogram

“…Several studies have shown that QRS scoring is associated with indirect estimated MI size after reperfusion (33)(34)(35). This is the first study, however, exploring the relationship between MI size by QRS scoring and DE-MRI in acute reperfused MI.…”