Kiuchi Kunihiko, Okajima Katsunori, Shimane Akira, Yokoi Kiminobu, Teranishi Jin, Aoki Kousuke, Chimura Misato, Tsubata Hideo, Miyata Taishi, Matsuoka Yuuki, Toba Takayoshi, Ohishi Shogo, Sawada Takahiro, Tsukishiro Yasue, Onishi Tetsuari, Kobayashi Seiichi, Yamada Shinichiro, Taniguchi Yasuyo, Yasaka Yoshinori, Kawai Hiroya, Ikeuchi Kazushi, Shigenaga Yutaka, Ikeda Takayuki
Department of Cardiology, Himeji Cardiovascular Center, 520 kou saishou, Himeji, Hyogo, Japan.
Department of Laboratory and Radiology, Himeji Cardiovascular Centre, 520 kou saishou, Himeji, Hyogo, Japan.
J Arrhythm. 2015 Apr;31(2):71-5. doi: 10.1016/j.joa.2014.06.005. Epub 2014 Aug 7.
Atrial tissue fibrosis has previously been identified using delayed-enhancement MRI (DE-MRI) in patients with atrial fibrillation (AF). Although the clinical importance of DE-MRI is well recognized, the visualization of atrial fibrosis and radiofrequency (RF) lesions has still not been achieved in Japan, primarily because of the differences in contrast agents, volume-rendering tools, and technical experience. The objective of this study was to visualize RF lesions by using commercially available tools.
DE-MRI was performed in 15 patients who had undergone AF ablation (age, 59±4 years, left atrium diameter, 40±2 mm). Specific parameters for MR scanning obtained from previous reports were modified.
Of the 15 images, the images of three patients were uninterpretable owing to low image quality. RF lesions could be visualized in 8 (67%) of the 12 patients.
In the current study, we successfully demonstrated that RF lesions could be visualized in Japanese patients using DE-MRI, although only commercially available tools were used.
此前已通过延迟强化磁共振成像（DE-MRI）在心房颤动（AF）患者中识别出心房组织纤维化。尽管DE-MRI的临床重要性已得到充分认可，但在日本仍未实现心房纤维化和射频（RF）损伤的可视化，主要原因在于造影剂、容积再现工具和技术经验方面的差异。本研究的目的是使用市售工具实现RF损伤的可视化。
对15例接受AF消融术的患者（年龄59±4岁，左心房直径40±2mm）进行DE-MRI检查。对先前报道中获得的MR扫描特定参数进行了修改。
15幅图像中，3例患者的图像因图像质量低而无法解读。12例患者中有8例（67%）的RF损伤能够被可视化。
在本研究中，我们成功证明，尽管仅使用了市售工具，但在日本患者中使用DE-MRI能够实现RF损伤的可视化。
