caa a22 4500 475752449 CHVBK 20180406123528.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/s005950070063 doi (NATIONALLICENCE)springer-10.1007/s005950070063 Video-Assisted Thoracoscopy System Guidance in Linear Radiofrequency Ablation [Elektronische Daten] [Yoshito Inoue, Ryohei Yozu, Yasunori Cho, Shiaki Kawada] The transcatheter creation of linear endocardial lesions in the atria has been attempted to restore sinus rhythm in patients with atrial fibrillation (AF). However, due to fluoroscopic limitations, there are a number of technical difficulties involved with using this procedure, which include determining the ablation site, orienting the catheter tip, and confirming tip-tissue contact. The present study was performed to assess the feasibility of employing a transthoracic approach to linear radiofrequency ablation using a video-assisted thoracoscopy system (VATS) to anatomically guide the experimental setting in beating swine hearts. AF was induced pharmacologically by aconitine solution. Epicardial radiofrequency linear ablation of the right atrium was conducted under VATS monitoring using an ablation catheter that was inserted and manipulated through trocar ports. The ablation energy setting was 80°C with 30 s duration per ablation. The thoracoscopic visual field for transthoracic ablation was adequate, and the ablation catheter was positioned and anchored safely on the atrial epicardium. The restoration of sinus rhythm was confirmed in the limb lead and atrial electrograms, and transmural heat degeneration was confirmed by postmortem histological examination in all specimens. Our results suggest the potential usefulness of VATS for providing adequate anatomical guidance in epicardial linear radiofrequency ablation. Springer-Verlag, 2000 Key Words Radiofrequency ablation nationallicence Video-assisted thoracoscopy nationallicence Atrial fibrillation nationallicence Inoue Yoshito Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut Yozu Ryohei Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut Cho Yasunori Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut Kawada Shiaki Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut https://doi.org/10.1007/s005950070063 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005950070063 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Inoue Yoshito Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut NATIONALLICENCE 700 1- Yozu Ryohei Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut NATIONALLICENCE 700 1- Cho Yasunori Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut NATIONALLICENCE 700 1- Kawada Shiaki Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, JP aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer