Measurement of The QT Dispersion In Patients With Cardiac Syndrome X For The Investigation of Ischemia As An Etiological Factor
Gökhan Alıcı, Gökmen Bellur, Birol Özkan, Mustafa Bulut, Müslüm Şahin, Bilal Boztosun, Ali Metin Esen
Keywords: Cardiac syndrome X, QT dispersion, ischemia, exercise treadmill testing.
Clinical and demographic characteristics of the groups such as age, gender body mass index, systolic and diastolic blood pressure showed no statistically significant differences between both groups. Although there was no difference in QTd values between groups at baseline (43,28 ± 12,55 msec in the positive ETT group, and 40,28 ± 11,08 msec in the control group, p=NS), peak exercise QTd was much higher in the positive ETT group than the control group (57,40 ± 13,70 msec and 28,23 ± 5,05 msec, respectively, p< 0.01). Since QTd greater than 60 msec related to ischemia has been previously reported, ETT positive patients were reevaluated in two different subgroups with QTd ? 60 msec (34 patients), and QTd < 60 msec(32 patients). The sum of ST depression were much more in the QTd ? 60 msec group (7,22 ± 0,74 vs 4,40 ± 1,78; t: -8,458, p