Key result
Standard 12-lead ECG with distal limb lead placement yielded higher accurate localization of successful ablation sites for OT-VT compared to modified torso placement (70-80% vs 50-60%, P=0.042).
Why the study?
Does standard distal limb lead placement improve the accuracy of localizing outflow tract ventricular tachycardia compared to torso placement in patients with OT-VT?
Population
20 consecutive patients with outflow tract ventricular tachycardia, mean age 51.6 ± 13.4 years, 50% male.
Comparison
Standard 12-lead ECG with distal placement of… vs Modified 12-lead ECG with limb electrodes placed…
Design
Cohort, 2 electrophysiologists who were blinded to the successful ablation site
Authors
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May favor standard distal limb leads for OT-VT mapping; leaves open confirmation in prospective trials.
Observational (n=20)
Single-blind (observers)
Does standard distal limb lead placement improve the accuracy of localizing outflow tract ventricular tachycardia compared to torso placement in patients with OT-VT?
p-value: p=0.042
Standard distal limb lead placement on 12-lead ECG provides significantly higher accuracy for localizing the origin of outflow tract ventricular tachycardia compared to torso placement.
Arya et al. (2011) conducted an observational in Idiopathic Outflow Tract Tachycardia (n=20). Standard 12-lead ECG (distal placement of limb lead electrodes) vs. Modified 12-lead ECG (limb electrodes placed on the torso) was evaluated on Rate of accurate localization of the successful ablation sites in the anterior versus posterior outflow tract (p=0.042). Standard 12-lead ECG with distal limb lead placement yielded higher accurate localization of successful ablation sites for OT-VT compared to modified torso placement (70-80% vs 50-60%, P=0.042).
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