Lead I R‐wave amplitude to differentiate idiopathic ventricular arrhythmias with left bundle branch block right inferior axis originating from the left versus right ventricular outflow tract

Abstract

The presence of R-wave amplitude in lead I (≥0.1 mV) is a simple and useful criterion to identify LVOT cusp or endocardium focus in LBRI arrhythmias. A QS pattern in lead I suggests an origin in the anterior RVOT, or less commonly the adjacent LV summit.

Idiopathic right ventricular arrhythmias with changes in the QRS morphology after ablation

“…Finally, continuous monitoring of the ECG during ablation for a change in QRS morphology should be considered to identify patients who will require further ablation. We have summarized in Table 1 important ECG characteristics indicative VA of specific origins, based on the findings of this study and previous studies in the literature 3,8–15 …”

A 12-Lead ECG database to identify origins of idiopathic ventricular arrhythmia containing 334 patients

“…Therefore, through analyzing the features of ECG, an accurate prediction of the OT-VA origins before the procedure can optimize the ablation result, reduce ablation duration, and avoid eventual operative complications. In fact, numerous studies [3][4][5][6][7][8][9][10][11] have already revealed a strong relationship between the characteristics of ECG and the sites (RVOT or LVOT) where OT-VA stems from.…”

“…Label selection. The available sites classification studies listed in 3,[5][6][7][8][9][10][11] were designed to distinguish LVOT and RVOT per patient. However, the sub locations under RVOT or LVOT are also important from a clinical prospective.…”

Idiopathic Right Ventricular Arrhythmias With Changes in the QRS Morphology After Ablation

“…We have summarized in Table 1 important ECG characteristics indicative VA of specific origins, based on the findings of this study and previous studies in the literature. 3,[8][9][10][11][12][13][14][15] 14. Doppalapudi H, Yamada T, McElderry HT, Plumb VJ, Epstein AE, Kay GN.…”