QRS Complex Duration is a Marker of Reperfusion in Patients Presenting with Acute ST Segment Elevation Myocardial Infarction

Abstract

Background: Acute myocardial ischemia decreases electrical conduction velocity through the ischemic myocardium, the aim of the study is to evaluate the value of the change in QRS complex duration as a marker of reperfusion in patients presenting with ST segment elevation myocardial infarction.

Correlation of QRS duration with myocardial blush grade as a marker of myocardial reperfusion in primary percutaneous coronary intervention

“…Similarly, Magdy et al. has shown in the study of 100 patients that QRS narrowing was significant in patients with a good MBG both at the end of 60th and 90th minutes post angioplasty 11 . All these studies further confirm ischemia as a cause of QRS prolongation and thus, explain the dynamic nature of QRS changes in these patients.…”

“…and Magdy et al. have shown that QRS narrowing of 10 msec was the best discriminative value for reperfusion assessment, which had a sensitivity of 90% and a specificity of around 80% 10, 11. Difference in this cutoff value may be because we had used a computerized method of calculating the QRS duration using EEPEE software, which is more precise and specific than the manual method.…”

“…have not performed any follow-up in their studies. Hence, we planned to conduct a proper clinical follow-up of at least 6 months duration in our study 10, 11…”