Depolarization-Repolarization Inhomogeneity After Repair of Tetralogy of Fallot

• DOI: 10.1161/01.cir.95.2.401
• Publication Date: 2012-06-12T00:41:02Z
• Authors: Michael A. Gatzoulis; Jan A. Till; Andrew N. Redington
• Keywords: Adult; Male; Middle Aged; Electrophysiology; Electrocardiography; 03 medical and health sciences; 0302 clinical medicine; Tachycardia, Ventricular; Tetralogy of Fallot; Humans; Female; Postoperative Period

We have previously shown that QRS prolongation (> or = 180 ms) is a risk marker for sustained ventricular tachycardia (VT) late after repair of tetralogy Fallot (rTOF). now examined the dispersion QT and its components JT, in an attempt to determine whether any association exists between these measurements presence VT patients.QRS duration QT/QRS/JT were measured manually from standard ECGs 10 syncopal rTOF patients (21.4 +/- 4.6 years repair; group 1) with > ms documented compared 9 no (group 2), 40 < clinical arrhythmias 3), nontetralogy control subjects (20 right bundle-branch block [group 4] 20 normal ECG patterns 5]). Mean (62 36 was greater than (34 ms, P .001). There significant differences all parameters groups 1 3 more importantly 2. also correlated but not JT dispersion.Our data suggest both depolarization repolarization abnormalities are associated rTOF. Furthermore, increased QT, QRS, dispersions, combined refine stratification patients.