Funding Sources: None.
ECG Criteria for Accurate Localization of Left Anterolateral and Posterolateral Accessory Pathways
Version of Record online: 4 OCT 2012
©2012, The Authors. Journal compilation ©2012 Wiley Periodicals, Inc.
Pacing and Clinical Electrophysiology
Volume 35, Issue 12, pages 1444–1450, December 2012
How to Cite
MOSS, J. D., GERSTENFELD, E. P., DEO, R., HUTCHINSON, M. D., CALLANS, D. J., MARCHLINSKI, F. E. and DIXIT, S. (2012), ECG Criteria for Accurate Localization of Left Anterolateral and Posterolateral Accessory Pathways. Pacing and Clinical Electrophysiology, 35: 1444–1450. doi: 10.1111/pace.12011
Conflicts of Interest: None.
- Issue online: 7 DEC 2012
- Version of Record online: 4 OCT 2012
- Received February 17, 2012; revised July 27, 2012; accepted July 27, 2012.
Figure S1. Sample ECGs (limb leads only) pre- and postablation of a left lateral AP. The QRS complexes in the inferior leads change markedly after abolition of AP conduction. Despite the complete reversal of dominant lead III polarity in both examples, the typical II > III relationship is maintained with preexcitation from a left anterolateral AP.
Figure S2. (A) Twelve-lead ECG with minimal preexcitation incorrectly identified as LAL-AP, with lead II/III ratio > 1. (B) During rapid atrial pacing and maximal preexcitation, the QRS polarity becomes negative in lead III, resulting in a lead II/III ratio < 1.
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