Key result
The combination of TZ index <0 and V2S/V3R index ≤1.5 discriminated left from right ventricular outflow tract tachycardia origin with 93.5% sensitivity, 85.9% specificity, and 87.3% accuracy.
Why the study?
Although several algorithms exist to predict the origin of idiopathic OT-VAs, a more accurate and efficient stepwise electrocardiographic algorithm was needed to discriminate LVOT from RVOT origin.
Does a two-stepwise electrocardiographic algorithm accurately distinguish left from right ventricular outflow tract tachycardia origin in patients with idiopathic OT-VAs?
Observational (n=173)
Does a two-stepwise electrocardiographic algorithm accurately distinguish left from right ventricular outflow tract tachycardia origin in patients with idiopathic OT-VAs?
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A simple two-stepwise ECG algorithm using TZ index and V2S/V3R index accurately distinguishes left from right ventricular outflow tract tachycardia origin.
Yu et al. (2020) conducted an observational in Idiopathic outflow tract ventricular arrhythmias (OT-VAs) (n=173). Stepwise electrocardiographic algorithm (TZ index <0 and V2S/V3R index ≤1.5) was evaluated on Discrimination of left ventricular outflow tract (LVOT) from right ventricular outflow tract (RVOT) origin. The combination of TZ index <0 and V2S/V3R index ≤1.5 discriminated left from right ventricular outflow tract tachycardia origin with 93.5% sensitivity, 85.9% specificity, and 87.3% accuracy.
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