ISSN 1016-5169 | E-ISSN 1308-4488
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Effect of Exercise and Dobutamine Stress Test on QT Dispersion in Patients with Coronary Heart Disease [Turk Kardiyol Dern Ars]
Turk Kardiyol Dern Ars. 1997; 25(6): 355-357

Effect of Exercise and Dobutamine Stress Test on QT Dispersion in Patients with Coronary Heart Disease

Dilek YEŞİLBURSA1, Akın SERDAR1, Kani GEMİCİ1, Sümeyye GÜLLÜLÜ1, Ali AYDINLAR1, Ali Rıza KAZAZOĞLU1, Ethem KUMBAY1, Jale CORDAN1, Nedim ÇOBANOĞLU1

Interderivational QT variability on 12-lead electrocardiography (ECG) is defined as QT dispersion (QTd), and it is accepted that this dispersion reflects regional variability of ventricular repolarization. In the present study symptom-limited maximal treadmill exercise testing and dobutamine stress echocardiography (DSE) (maximum 40g/kg/min) were performed in 28 cases in whom major coronary artery stenosis of more than 50% was established by coronary angiography. In cases with or without myocardial ischemia the relationship between QTd was investigated. While the difference between QTd which was measured at rest and peak exercise in cases who had ischemia during exercise test was significant (p<0.05), no significant difference was observed in cases without ischemia. Moreover, a significant difference was established between QTd before and during maximum dobutamine infusion in cases with ischemia during DSE, whereas there was no significant difference in cases without ischemia. Hence, in stress tests performed by pharmacological and nonpharmacological agents, QTd values increased in patients with ischemia but there was not any significant difference between the methods used.


How to cite this article
Dilek YEŞİLBURSA, Akın SERDAR, Kani GEMİCİ, Sümeyye GÜLLÜLÜ, Ali AYDINLAR, Ali Rıza KAZAZOĞLU, Ethem KUMBAY, Jale CORDAN, Nedim ÇOBANOĞLU. Effect of Exercise and Dobutamine Stress Test on QT Dispersion in Patients with Coronary Heart Disease. Turk Kardiyol Dern Ars. 1997; 25(6): 355-357
Manuscript Language: Turkish


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