Volume 12, Number 4 (Winter 2009)                   hmj 2009, 12(4): 223-230 | Back to browse issues page


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Yosefian S, Farshidi H, Sobahni M, Rahimi S. QT-Dispersion as a potential marker in prognosis of acute myocardial infarction. hmj. 2009; 12 (4) :223-230
URL: http://hmj.hums.ac.ir/article-1-434-en.html

Abstract:   (7304 Views)
Introduction: QT dispersion in a 12 lead ECG represents the heterogeneity of ventricular repolarization. The prolongation of QT-interval dispersion increases the risk of coronary heart disease, ventricular arrhythmia, and sudden cardiac death in patients with myocardial infarction. We aimed to investigate the prognostic value of QT-dispersion in patients with acute myocardial infarction.
Methods: A total number of 79 patients with acute myocardial infarction and 21 healthy controls were recruited. The QT-dispersion was estimated using a 12-lead surface electrocardiogram, 24 hours and 4-6 days after myocardial infarction.
Results: In patient group, the average QT-dispersion was 92.8±42.2 ms and 80.3±33.4 ms after 24 hours and four days respectively whereas in control group it was 47.1±16.8 ms (p<0.001). The relative frequency of arrhythmia in patients was 24%. Our study showed that the average of QT- dispersion of arrhythmia in patients was significantly different and higher (p<0.05) compared to patients without arrhythmia.
Conclusion: We showed that increased QT-dispersion is a potential marker in prognosis of patients with acute myocardial infarction.
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Type of Study: Research | Subject: General
Received: 2012/10/30

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