Novel Transitional Zone Index Allows More Accurate Differentiation between Idiopathic Right Ventricular Outflow Tract and Aortic Sinus Cusp Ventricular Arrhythmias
| Autor: | Tomohiro Uchikawa, Yasuya Inden, Makoto Hirai, Masayuki Shimano, Kazuhisa Kitamura, Yukiomi Tsuji, Naoki Yoshida, Toyoaki Murohara, Hiromi Kamiya |
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| Rok vydání: | 2011 |
| Předmět: |
Male
medicine.medical_specialty medicine.medical_treatment Catheter ablation Ventricular Outflow Obstruction Ventricular tachycardia Sensitivity and Specificity Heart Conduction System Physiology (medical) Internal medicine Aortic sinus medicine Humans Ventricular outflow tract Cutoff Arrhythmia Sinus Sinus (anatomy) Aged Receiver operating characteristic business.industry Left bundle branch block Body Surface Potential Mapping Area under the curve Anatomy Middle Aged Sinus of Valsalva medicine.disease medicine.anatomical_structure ROC Curve cardiovascular system Catheter Ablation Cardiology Cusp (anatomy) Female Electrical conduction system of the heart Cardiology and Cardiovascular Medicine business |
| Zdroj: | Journal of Arrhythmia. 27:JAAC_4 |
| ISSN: | 1883-2148 1880-4276 |
| DOI: | 10.4020/jhrs.27.jaac_4 |
| Popis: | Background: Although several ECG algorithms have been proposed for differentiating the origins of outflow tract ventricular arrhythmia (OT-VA), their accuracy is still limited in cases with cardiac rotation.Objective: The purpose of this study was to assess whether a novel “cardiac rotation-corrected” transitional zone (TZ) index would be a useful marker for differentiating right ventricular outflow tract (RVOT) origin from aortic sinus cusp (ASC) origin.Methods: Surface ECGs of OT-VAs with left bundle branch block morphology and inferior axis in 112 patients who were successfully ablated in the RVOT (n=87) or the ASC (n=25) were analyzed. According to the site of R-wave transition, TZ score was graded with 0.5-point increments (e.g. V2=2-point, V3–V4=3.5-point, V5=5-point) and TZ index was defined as follows: TZ score of OT-VA minus TZ score of sinus beat.Results: The TZ index was significantly lower in the ASC origin than in the RVOT origin (−1.2±0.9 vs. 0.3±0.7, p |
| Databáze: | OpenAIRE |
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