- 著者
- Takuya Matsumoto Satoshi Kodera Hiroki Shinohara Hirotaka Ieki Toshihiro Yamaguchi Yasutomi Higashikuni Arihiro Kiyosue Kaoru Ito Jiro Ando Eiki Takimoto Hiroshi Akazawa Hiroyuki Morita Issei Komuro
- 出版者
- International Heart Journal Association
- 雑誌
- International Heart Journal (ISSN:13492365)
- 巻号頁・発行日
- vol.61, no.4, pp.781-786, 2020-07-30 (Released:2020-07-30)
- 参考文献数
- 13
- 被引用文献数
- 26
The development of deep learning technology has enabled machines to achieve high-level accuracy in interpreting medical images. While many previous studies have examined the detection of pulmonary nodules in chest X-rays using deep learning, the application of this technology to heart failure remains rare. In this paper, we investigated the performance of a deep learning algorithm in terms of diagnosing heart failure using images obtained from chest X-rays. We used 952 chest X-ray images from a labeled database published by the National Institutes of Health. Two cardiologists verified and relabeled a total of 260 "normal" and 378 "heart failure" images, with the remainder being discarded because they had been incorrectly labeled. Data augmentation and transfer learning were used to obtain an accuracy of 82% in diagnosing heart failure using the chest X-ray images. Furthermore, heatmap imaging allowed us to visualize decisions made by the machine. Deep learning can thus help support the diagnosis of heart failure using chest X-ray images.
- 著者
- Taku Sakai Atsuhiko T. Naito Yuki Kuramoto Masamichi Ito Katsuki Okada Tomoaki Higo Akito Nakagawa Masato Shibamoto Toshihiro Yamaguchi Tomokazu Sumida Seitaro Nomura Akihiro Umezawa Shigeru Miyagawa Yoshiki Sawa Hiroyuki Morita Jong-Kook Lee Ichiro Shiojima Yasushi Sakata Issei Komuro
- 出版者
- International Heart Journal Association
- 雑誌
- International Heart Journal (ISSN:13492365)
- 巻号頁・発行日
- pp.17-730, (Released:2018-08-11)
- 参考文献数
- 28
- 被引用文献数
- 13
Hypertrophic cardiomyopathy (HCM) is a genetic disorder that is characterized by hypertrophy of the myocardium. Some of the patients are diagnosed for HCM during infancy, and the prognosis of infantile HCM is worse than general HCM. Nevertheless, pathophysiology of infantile HCM is less investigated and remains largely unknown. In the present study, we generated induced pluripotent stem cells (iPSCs) from two patients with infantile HCM: one with Noonan syndrome and the other with idiopathic HCM. We found that iPSC-derived cardiomyocytes (iPSC-CMs) from idiopathic HCM patient were significantly larger and showed higher diastolic intracellular calcium concentration compared with the iPSC-CMs from healthy subject. Unlike iPSC-CMs from the adult/adolescent HCM patient, arrhythmia was not observed as a disease-related phenotype in iPSC-CMs from idiopathic infantile HCM patient. Phenotypic screening revealed that Pyr3, a transient receptor potential channel 3 channel inhibitor, decreased both the cell size and diastolic intracellular calcium concentration in iPSC-CMs from both Noonan syndrome and idiopathic infantile HCM patients, suggesting that the target of Pyr3 may play a role in the pathogenesis of infantile HCM, regardless of the etiology. Further research may unveil the possibility of Pyr3 or its derivatives in the treatment of infantile HCM.