Key result
V2S/V3R index ≤1.5 predicts LVOT origin of VAs with ~94% specificity, outperforming other ECG criteria.
Why the study?
Does the V2S/V3R index accurately differentiate left from right ventricular outflow tract tachycardia origins in patients with OT-VAs?
Observational (n=207)
Does the V2S/V3R index accurately differentiate left from right ventricular outflow tract tachycardia origins in patients with OT-VAs?
Effect estimate: AUC 0.964
p-value: p=<0.001
The V2S/V3R index is a highly accurate novel ECG criterion for differentiating left from right ventricular outflow tract tachycardia origins, outperforming previously proposed criteria.
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May aid noninvasive OT-VA localization; leaves open prospective validation before changing practice.
Yoshida et al. (2014) conducted an observational in Idiopathic ventricular arrhythmias originating from the outflow tract (n=207). V2S/V3R index vs. Other ECG criteria was evaluated on Differentiating between left and right OT-VA origins (AUC 0.964, p=<0.001). The V2S/V3R index ≤1.5 predicted a left ventricular outflow tract origin for ventricular arrhythmias with 89% sensitivity and 94% specificity (AUC 0.964), outperforming other ECG criteria.
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