Gehan Magdy, Hesham El Ashmawy, Kamal Mahmoud and Asmaa Youssef
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.
Methods: The study included 100 patients presented with ST segment elevation myocardial infarction, 50% treated with fibrinolysis and 50% with primary Percutaneous intervention, all patients were subjected to 12 lead electrocardiography with measurement of QRS complex duration (in millisecond) on admission, sixty and ninety minutes post reperfusion , coronary angiography was done to all patients and they were divided into two groups according to myocardial blush grade, group A (5 5%) with normal reperfusion (grade 2 and 3) and group B (45%) with impaired reperfusion (grade 0 and 1).
Results: We found that the admission QRS duration didn’t differ in the two groups (p=0.859), and QRS complex duration was found to be significantly shorter in group A at both 60 and 90 min post reperfusion (p˂0.001 for both), and found a strong positive correlation between myocardial blush grade and QRS complex narrowing at both 60 min and 90 min post reperfusion respectively (r=0.731, p˂0.001 and r=0.739, p˂0.001). A cut off 10 msec was determined to be the best QRS complex narrowing duration for prediction of reperfusion at both 60 and 90 min post reperfusion with 100% sensitivity, and a specificity of (43.64% and 58.18%) at 60 min and 90 min post reperfusion respectively.
Conclusion: QRS duration changes post reperfusion is strongly correlated to myocardial reperfusion in patients presenting with ST segment elevation myocardial infarction.
இந்தக் கட்டுரையைப் பகிரவும்
English 
Spanish 
Chinese 
Russian 
German 
French 
Japanese 
Portuguese 
Hindi 