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Vectorcardiographic predictors of ventricular arrhythmia inducibility in patients with tetralogy of Fallot. Journal of electrocardiology Cortez, D. n., Ruckdeschel, E. n., McCanta, A. C., Collins, K. n., Sauer, W. n., Kay, J. n., Nguyen, D. n. 2014; 48 (2): 141–44

Abstract

Vectorcardiography (VCG) may have predictive value in Tetralogy of Fallot (TOF) patients undergoing ventricular arrhythmia inducibility (VAI) electrophysiology studies (EPs).Blinded, retrospective analyses of 37 adult TOF patients undergoing EPs prior to pulmonary valve replacements were performed (21 female, median age 37years). VAI was evaluated from EPs and resting 12-lead electrocardiograms, respectively using QRS and heart rate adjusted Q-T intervals, spatial QRS-T angles (peaks), T-wave and QRS-wave (QRSwave vc) component vector root mean squares. Differences were assessed (Student t-tests, Mann Whitney U-tests, Analysis of Variance). Relative risks were calculated.16 patients had VAI (6 monomorphic, 10 polymorphic). Only the QRSwave vc showed significant differences between those with and without VAI, 10.5±2.4 dmV vs. 13.9±4.5dmV, respectively (p=0.002), area under the ROC curve of 0.78 and relative risk of 2.52.VCG evidence of depolarization differences was significant between TOF patients with and without inducible VA.

View details for DOI 10.1016/j.jelectrocard.2014.11.009

View details for PubMedID 25483288