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Development of a Visualization Deep Learning Model for Classifying Origins of Ventricular Arrhythmias

Nakasone, Kazutaka Nishimori, Makoto Kiuchi, Kunihiko Shinohara, Masakazu Fukuzawa, Koji Takami, Mitsuru El Hamriti, Mustapha Sommer, Philipp Sakai, Jun Nakamura, Toshihiro Yatomi, Atsusuke Sonoda, Yusuke Takahara, Hiroyuki Yamamoto, Kyoko Suzuki, Yuya Tani, Kenichi Iwai, Hidehiro Nakanishi, Yusuke Hirata, Ken-ichi 神戸大学

2022.07.25

概要

Background: Several algorithms have been proposed for differentiating the right and left outflow tracts (RVOT/LVOT) arrhythmia origins from 12-lead electrocardiograms (ECGs); however, the procedure is complicated. A deep learning (DL) model, a form of artificial intelligence, can directly use ECGs and depict the importance of the leads and waveforms. This study aimed to create a visualized DL model that could classify arrhythmia origins more accurately.

Methods and Results: This study enrolled 80 patients who underwent catheter ablation. A convolutional neural network-based model that could classify arrhythmia origins with 12-lead ECGs and visualize the leads that contributed to the diagnosis using a gradient-weighted class activation mapping method was developed. The average prediction results of the origins by the DL model were 89.4% (88.2–90.6) for accuracy and 95.2% (94.3–96.2) for recall, which were significantly better than when a conventional algorithm is used. The ratio of the contribution to the prediction differed between RVOT and LVOT origins. Although leads V1 to V3 and the limb leads had a focused balance in the LVOT group, the contribution ratio of leads aVR, aVL, and aVF was higher in the RVOT group.

Conclusions: This study diagnosed the arrhythmia origins more accurately than the conventional algorithm, and clarified which part of the 12-lead waveforms contributed to the diagnosis. The visualized DL model was convincing and may play a role in understanding the pathogenesis of arrhythmias.

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