ABSTRACT
The purpose of this study was to examine the relationship between T-peak-to-T-end interval and its dispersion in children with syncope to detect possible repolarization abnormalities in these patients. We enrolled 19 patients with a positive tilt test for syncope [7 boys, 12 girls] and 35 participants with normal results on the test. Mean age was 11.4 +/- 3.1 years in patients and 10.0 +/- 5.1 years in controls [P = 0.27]. The T-peak-to-T-end interval in lead V1 was significantly longer in patients with a positive tilt test [0.36 +/- 0.062 versus 0.32 +/- 0.071, P = 0.007]. T-peak-to-T-end interval dispersion was significantly greater in the group of patients [0.15 +/- 0.07 versus 0.11 +/- 0.04, P +/- 0.003]. The T-peak-to-T-end interval in lead V1 and T-peak-to-T-end dispersion were significantly larger in patients with a positive tilt test. Our findings suggest a depolarization abnormality in children with syncope