Interventricular septum angle obtained from cardiac computed tomography for origin differentiation of outflow tract ventricular arrhythmia between left and right

• DOI: 10.1111/pace.14593
• Publication Date: 2022-09-15T10:14:56Z
• Authors: Xiaomei Zhu; Shumin Chen; Kefan Ma; Zenghong Chen; Chun Chen; Zhixin Jiang
• Keywords: Ventricular outflow tract; Interventricular septum

Our objective was to explore whether the accuracy of transitional zone index (TZI) for outflow tract ventricular arrhythmias (OT-VAs) origin is affected by cardiac rotation and additive value interventricular septum angle (IVSa) obtained from coronary computed tomography angiography (CCTA).Standard 12-lead ECGs OT-VAs with inferior axis in consecutive patients undergoing both CCTA examination successful ablation were retrospectively analyzed. The IVSa defined as an between long IVS sagittal body CCTA.64 (31 men; mean age 54.2 ± 11.6 years) enrolled. exhibited right 46 (71.9%) 36 (78.3%) diagnosed correctly TZI. left observed 18 (28.1%) 16 (88.9%) then divided into TZI correct group (n = 52) incorrect 12). In group, 11/12 (91.7%) cases R/S transition lead V3 TZ score during premature contractions [2.8(2.5-3.4)], -1.5 0. significantly larger than (52.0 6.9° vs. 39.0 6.1°; p < .0001). ≥46° predicted 92% sensitivity, 94% specificity, accuracy.The a novel that reliably improves differentiate origin, especially transition.