Key result
Poor coronary collateral circulation was associated with longer QRS duration on admission in patients with acute myocardial infarction (p < 0.005).
Why the study?
Is longer QRS duration on admission associated with poor coronary collateral circulation in patients with acute myocardial infarction?
Observational (n=109)
Is longer QRS duration on admission associated with poor coronary collateral circulation in patients with acute myocardial infarction?
Longer QRS duration on admission in patients with acute anterior myocardial infarction is associated with poorer coronary collateral circulation.
Admission QRS prolongation was associated with poor collaterals in AMI; leaves open prospective utility for ECG-based collateral assessment.
BACKGROUND: It is known that QRS duration is related to prognosis in acute myocardial infarction. The relation between QRS duration and coronary collateral circulation is uncertain. In the present study, we aimed to determine the relation between QRS duration and coronary collateral circulation in patients admitted with acute myocardial infarction. METHODS: The present study was composed of 109 consecutive patients with acute myocardial infarction. All patients had total occlusion in the left anterior descending coronary artery. Electrocardiographic recordings on admission were obtained for the assessment of QRS duration. The Rentrop classification was used to define coronary collateral circulation on coronary angiography. Patients were divided into two groups as follows: Group 1 with poor coronary collateral circulation (Rentrop 0-1) and Group 2 with good coronary collateral circulation (Rentrop 2-3). RESULTS: Of all patients, 62 patients were included in group 1 and 47 patients in group 2, respectively. In the present study, patients in the group 1 had longer QRS duration than patients in the group 2 (p < 0.005). Additionally, we found that Rentrop grading had negative correlation with both QRS duration and white blood cell count (r: -0.28; p < 0.005 and r: -0.35; p < 0.001). CONCLUSION: Our study showed that there was an inverse relationship between QRS duration on admission and presence of coronary collateral circulation in patients with acute myocardial infarction.
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Karahan et al. (2016) conducted an observational in Acute myocardial infarction (n=109). Poor coronary collateral circulation (Rentrop 0-1) vs. Good coronary collateral circulation (Rentrop 2-3) was evaluated on QRS duration (r: -0.28, p=< 0.005). Poor coronary collateral circulation was associated with longer QRS duration on admission in patients with acute myocardial infarction (p < 0.005).
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