Relation of Myocardial Perfusion Abnormalities to Increased QT Dispersion and Value of QT Dispersion in Identification of High-risk Patients With Coronary Artery Disease [Turk Kardiyol Dern Ars]
Turk Kardiyol Dern Ars. 1998; 26(3): 136-141

Relation of Myocardial Perfusion Abnormalities to Increased QT Dispersion and Value of QT Dispersion in Identification of High-risk Patients With Coronary Artery Disease

Mehmet AKSOY1, Ömer GÖKTEKİN1, Metin GÜRSÜRER1, Ayşe Emre PINARLI1, İzzet ERDİNLER1, Dursun ÜNAL1, Turgut SİBER1, Birsen ERSEK1

This study sought to evaluate the relation of myocardial perfusion abnormalities to increased QT dispersion (QTd) and the relationship between QTd and scintigraphic high-risk parameters providing prognostic information in patients with coronary artery disease (CAD). 1ı2 consecutive patients (52±9 yrs) referred to exercise Tl-20 ı scintigraphy were studied, using reinjection protocol. SPECT images were divided into 20 segments; each segment was classified as normal, reversible defect, viable or nonviable fixed defect. Accordingly, cases were divided into 4 groups as normal subjects (n=45), patients with only reversible defects (n=28), patients with only nonviable fixed defects (n=22) and patients w ith reversible, viable and nonviable defects (n= ı7). Involvement of 5 or more segments, increased lung Tl-201 uptake and transient left ventricular dilatation were considered as scintigraphic high-risk parameters. QTd was defined as the difference between maximal and minimal QT intervals in at least 8 leads of the surface ECG. Mean QTd was 39±9 msec in normal subjects, 62±20 msec in patients with only reversible defects, 65±22 msec in patients with only nonviable fixed defects and 67± ı9 m see in the remaining patients. There was a significant difference between normal subjects and patient groups (pKeywords: QT dispersion, exercise Tl-201 scintigraphy


How to cite this article
Mehmet AKSOY, Ömer GÖKTEKİN, Metin GÜRSÜRER, Ayşe Emre PINARLI, İzzet ERDİNLER, Dursun ÜNAL, Turgut SİBER, Birsen ERSEK. Relation of Myocardial Perfusion Abnormalities to Increased QT Dispersion and Value of QT Dispersion in Identification of High-risk Patients With Coronary Artery Disease. Turk Kardiyol Dern Ars. 1998; 26(3): 136-141
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