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The Journal of Tehran University Heart Center، جلد ۹، شماره ۴، صفحات ۱۶۶-۱۷۳
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عنوان انگلیسی Comparison between QT Interval Parameters in Type 2 Diabetic and Nondiabetic Patients with Non-ST Elevation Myocardial Infarction
چکیده انگلیسی مقاله Background: QT interval parameters have been suggested as a predictor of lethal arrhythmia and mortality in patients with myocardial infarction. The aim of the present study was to compare the value of QT interval indices in patients presenting with non-ST-segment elevation myocardial infarction (NSTEMI) between a group of patients with type 2 diabetes mellitus and a nondiabetic group of patients. Methods: This case-control study evaluated QT interval parameters in 115 patients (47 diabetic and 68 nondiabetic patients) diagnosed with NSTEMI between September 2011 and July 2012. The following QT interval indices were analyzed: maximum (max) and minimum (min) QT interval; max and min corrected QT interval (QTc); QT dispersion (QTd); and corrected QT dispersion (QTcd). All the patients were observed for ventricular arrhythmia during their hospital course and underwent coronary angiography. They were selected to undergo coronary artery bypass surgery (CABG) or percutaneous coronary angioplasty (PCI) based on their coronary anatomy. Results: The mean age of the patients was 60.8 ± 11.4 years. The patients were 40.0% female and 60.0% male. There were no significant differences in clinical characters between type 2 diabetic and nondiabetic patients with NSTEMI. Compared with post-myocardial infarction patients without diabetes, those with type 2 diabetes had higher QTc max , QTd and QTcd (p value < 0.05). There was a significant difference in QTd and QTcd in the patients needing coronary revascularization with diabetes as opposed to the nondiabetics (p value = 0.035 and p value = 0.025, respectively) as well as those who had ventricular arrhythmia with diabetes (p value = 0.018 and p value = 0.003, respectively). QTcd was higher in the patients who had higher in-hospital mortality (p value = 0.047). The QTc max, QTd and QTcd were significantly (all p values < 0.05) associated with ventricular arrhythmia, QTcd with need for revascularization and QTc max with in-hospital mortality in the diabetic patients. Conclusion: Based on the findings of this study, it seems that type 2 diabetics with NSTEMI have greater QTc max, QTd, and QTcd and these QT parameters may have a relationship with worse cardiac outcomes and poorer prognoses.
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نویسندگان مقاله | HamidReza Bonakdar
Heshmat Cardiovascular Medical Center, Guilan University of Medical Sciences, Rasht, Iran.


| Masoumeh Aslanpour
Heshmat Cardiovascular Medical Center, Guilan University of Medical Sciences, Rasht, Iran.


| Hassan Moladoust
Cardiovascular Research Center, Guilan University of Medical Sciences, Rasht, Iran.


| Parham Sadeghipour
Heshmat Cardiovascular Medical Center, Guilan University of Medical Sciences, Rasht, Iran.


| Fereshteh Mohamadi
Razi General Hospital, Guilan University of Medical Sciences, Rasht, Iran.


| Mohammad AssadianRad
Heshmat Cardiovascular Medical Center, Guilan University of Medical Sciences, Rasht, Iran.


| Jalal Kheirkhah
Heshmat Cardiovascular Medical Center, Guilan University of Medical Sciences, Rasht, Iran.
نشانی اینترنتی http://jthc.tums.ac.ir/index.php/jthc/article/view/351
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