A Novel Electrocardiographic Criterion for Differentiating a Left from Right Ventricular Outflow Tract Tachycardia Origin: The V2S/V3R Index

Although several ECG criteria have been proposed for differentiating between left and right origins of idiopathic ventricular arrhythmias (VA) originating from the outflow tract (OT‐VA), their accuracy and usefulness remain limited. This study was undertaken to develop a more accurate and useful ECG criterion for differentiating between left and right OT‐VA origins.

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