PMID: 9558690Apr 29, 1998Paper

JT dispersion in Wolff-Parkinson-White syndrome: effect of eccentric ventricular depolarization on the dispersion of repolarization

Pacing and Clinical Electrophysiology : PACE
S BalajiP C Gillette

Abstract

There is much interest in QT dispersion for noninvasive risk stratification of patients at risk of arrhythmias. However, little is known about the genesis of abnormal QT dispersion. In particular, whether eccentric ventricular depolarization, as seen in preexcitation, can lead to abnormal dispersion of repolarization is unknown. We studied 24 children aged 1-19 years (mean +/- SD, 11 +/- 5 years) with manifest preexcitation due to Wolff-Parkinson-White syndrome who had successful catheter ablation. Standard ECGs done preablation, early postablation (< 1 week), mid postablation (> 1 week, < 2 months), and late postablation (> 2 months) were reviewed. The QRS duration prior to ablation ranged from 90-160 ms (mean +/- SD, 123 +/- 21 ms). On the preablation ECG, the JT and JTc dispersions showed no relationship to the QRS duration (r = 0.04 and 0.07, respectively). There was no change in JT dispersion when the preablation (42 +/- 15 ms) ECG was compared to early (43 +/- 15 ms), mid (44 +/- 13 ms), and late postablation (48 +/- 19 ms) ECGs. There was no significant change in JTc dispersion as well. Thus, JT dispersion is unrelated to QRS duration and unaffected by catheter ablation in patients with Wolff-Parkinson-White syndrome. Ec...Continue Reading

References

Jul 1, 1992·The American Journal of Cardiology·D H Spodick
Mar 1, 1995·Journal of the American College of Cardiology·M ZabelM R Franz
Jan 1, 1995·British Heart Journal·P D HighamR W Campbell
Jun 15, 1994·International Journal of Cardiology·M MiorelliA Nava
May 1, 1994·Pacing and Clinical Electrophysiology : PACE·J KautznerM Malik

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Citations

May 30, 2019·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Julia AranyoRoger Villuendas

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