Discrete Prepotential as an Indicator of Successful Ablation in Patients With Coronary Cusp Ventricular Arrhythmia

• DOI: 10.1161/circep.113.000157
• Publication Date: 2013-08-28T00:17:12Z
• Authors: Hitoshi Hachiya; Yasuteru Yamauchi; Yoshito Iesaka; Atsuhiko Yagishita; Takeshi Sasaki; Koji Higuchi; Mihoko Kawabata; Koji Sugiyama; Yasuaki Tanaka; Shigeki Kusa; Hiroaki Nakamura; Shinsuke Miyazaki; Hiroshi Taniguchi; Mitsuaki Isobe; Kenzo Hirao
• Keywords: Adult; Male; Heart Ventricles; Action Potentials; Arrhythmias, Cardiac; Middle Aged; Electrocardiography; 03 medical and health sciences; Treatment Outcome; 0302 clinical medicine; Japan; Catheter Ablation; Humans; Female; Electrophysiologic Techniques, Cardiac; Aged

Background— Although coronary cusp (CC) ventricular arrhythmia (VA) can be treated by catheter ablation, reliable indicators of successful ablation sites have not been fully identified. Methods and Results— This study comprised 392 patients undergoing radiofrequency for outflow tract-VA at 3 institutions from January 2007 to August 2012. The site was on the left CC or right in 35 (8.9%) patients. In 9 (26%) these patients, a discrete prepotential recognized, 5 whom had CC-VAs 4 CC-VAs. Radiofrequency all duration isoelectric line between end onset electrogram 27±13 ms. time QRS (activation time) 69±20 ms (range, 50–98 ms). Pace mapping graded as excellent only 1 patient. No recorded any case this study. Conclusions— A seen with CC-VA. CC-VA, ≥50 activation may indicate site.