Commentary: A novel and effective ECG method to differentiate right from left ventricular outflow tract arrhythmias: angle-corrected V2S

Figures

• 

  Figure 1. Predictive accuracy of different ECG algorithms from Qiu et al. (A) (1), Anderson et al. (B) (8), and our previous study (C,D) (5). (A) The ROC curves of the TZ index and V2S/V3R index were above the reference line (diagonal line), while the ROC curve of the combined TZ index and V2S/V3R was below the reference line in the same ROC curve analysis. (B) The ROC curves of the TZ index, V2S/V3R index, and combined TZ index and V2S/V3R were all above the reference line in two separate ROC curve analyses. (C) Using our published data to compare all the ECG algorithms in the same ROC curve analysis without changing the “Test Direction” for the TZ index and V2S/V3R index, the ROC curves of the TZ index and V2S/V3R index were below the reference line. (D) After changing the “Test Direction” (“Smaller test result indicates more positive test”) for the TZ index and V2S/V3R index, the ROC curves of all the ECG algorithms could be above the reference line in two separate ROC curve analyses. (RightsLink License Number 5579081364648).