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436 results on '"Ikenaga, Hiroki"'

3. Determination of lipid-rich plaques by artificial intelligence-enabled quantitative computed tomography using near-infrared spectroscopy as reference

Author

Omori, Hiroyuki, Matsuo, Hitoshi, Fujimoto, Shinichiro, Sobue, Yoshihiro, Nozaki, Yui, Nakazawa, Gaku, Takahashi, Kuniaki, Osawa, Kazuhiro, Okubo, Ryo, Kaneko, Umihiko, Sato, Hideyuki, Kajiya, Takashi, Miyoshi, Toru, Ichikawa, Keishi, Abe, Mitsunori, Kitagawa, Toshiro, Ikenaga, Hiroki, Saji, Mike, Iguchi, Nobuo, Ijichi, Takeshi, Mikamo, Hiroshi, Kurata, Akira, Moroi, Masao, Iijima, Raisuke, Malkasian, Shant, Crabtree, Tami, Min, James K., Earls, James P., and Nakanishi, Rine

Published
2023
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4. Rationale and design of the INVICTUS Registry: (Multicenter Registry of Invasive and Non-Invasive imaging modalities to compare Coronary Computed Tomography Angiography, Intravascular Ultrasound and Optical Coherence Tomography for the determination of Severity, Volume and Type of coronary atherosclerosiS)

Author

Nakanishi, Rine, Okubo, Ryo, Sobue, Yoshihiro, Kaneko, Umihiko, Sato, Hideyuki, Fujimoto, Shinichiro, Nozaki, Yui, Kajiya, Takashi, Miyoshi, Toru, Ichikawa, Keishi, Abe, Mitsunori, Kitagawa, Toshiro, Ikenaga, Hiroki, Osawa, Kazuhiro, Saji, Mike, Iguchi, Nobuo, Nakazawa, Gaku, Takahashi, Kuniaki, Ijich, Takeshi, Mikamo, Hiroshi, Kurata, Akira, Moroi, Masao, Iijima, Raisuke, Malkasian, Shant, Crabtree, Tami, Chamie, Daniel, Lansky, Alexandra J., Min, James K., Earls, James P., and Matsuo, Hitoshi

Published
2023
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5. JCS/CVIT/JCC 2023 guideline focused update on diagnosis and treatment of vasospastic angina (coronary spastic angina) and coronary microvascular dysfunction

Author

Hokimoto, Seiji, Kaikita, Koichi, Yasuda, Satoshi, Tsujita, Kenichi, Ishihara, Masaharu, Matoba, Tetsuya, Matsuzawa, Yasushi, Mitsutake, Yoshiaki, Mitani, Yoshihide, Murohara, Toyoaki, Noda, Takashi, Node, Koichi, Noguchi, Teruo, Suzuki, Hiroshi, Takahashi, Jun, Tanabe, Yasuhiko, Tanaka, Atsushi, Tanaka, Nobuhiro, Teragawa, Hiroki, Yasu, Takanori, Yoshimura, Michihiro, Asaumi, Yasuhide, Godo, Shigeo, Ikenaga, Hiroki, Imanaka, Takahiro, Ishibashi, Kohei, Ishii, Masanobu, Ishihara, Takayuki, Matsuura, Yunosuke, Miura, Hiroyuki, Nakano, Yasuhiro, Ogawa, Takayuki, Shiroto, Takashi, Soejima, Hirofumi, Takagi, Ryu, Tanaka, Akihito, Taruya, Akira, Tsuda, Etsuko, Wakabayashi, Kohei, Yokoi, Kensuke, Minamino, Toru, Nakagawa, Yoshihisa, Sueda, Shozo, Shimokawa, Hiroaki, and Ogawa, Hisao

Published
2023
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7. Successful MitraClip Procedure Following Surgical Inferior Vena Cava Filter Removal

Author

Higashihara, Tasuku, primary, Ikenaga, Hiroki, additional, Shigehara, Mikio, additional, Osawa, Ayano, additional, Nakano, Takayuki, additional, Morita, Yuichi, additional, Itakura, Kiho, additional, Watanabe, Noriaki, additional, Sada, Yoshiharu, additional, Utsunomiya, Hiroto, additional, Takasaki, Taiichi, additional, Takahashi, Shinya, additional, and Nakano, Yukiko, additional

Published
2024
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8. Abstract 13674: Optimal Hounsfield Threshold for Lipid-Rich Plaque by Artificial Intelligence-Enabled Quantitative CT Using Near-Infrared Spectroscopy

Author

Omori, Hiroyuki, Matsuo, Hitoshi, Earls, James, Sobue, Yoshihiro, Fujimoto, Shinichiro, Nozaki, Yui, Nakazawa, Gaku, Takahashi, Kuniaki, Osawa, Kazuhiro, Okubo, Ryo, Kaneko, Umihiko, Sato, Hideyuki, Kajiya, Takashi, Miyoshi, Toru, Ichikawa, Keishi, Abe, Mitsunori, Kitagawa, Toshiro, Ikenaga, Hiroki, Saji, Mike, Iguchi, Nobuo, Ijichi, Takeshi, Mikamo, Hiroshi, Kurata, Akira, Moroi, Masao, iijima, raisuke, Crabtree, Tami, Min, James K, and Nakanishi, Rine

Published
2022
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9. Abstract 13665: Determination of Lipid-Rich Plaque by Artificial Intelligence-Enabled Quantitative Computed Tomography Using Near-Infrared Spectroscopy

Author

Omori, Hiroyuki, Matsuo, Hitoshi, Earls, James, Sobue, Yoshihiro, Fujimoto, Shinichiro, Nozaki, Yui, Nakazawa, Gaku, Takahashi, Kuniaki, Osawa, Kazuhiro, Okubo, Ryo, Kaneko, Umihiko, Sato, Hideyuki, Kajiya, Takashi, Miyoshi, Toru, Ichikawa, Keishi, Abe, Mitsunori, Kitagawa, Toshiro, Ikenaga, Hiroki, Saji, Mike, Iguchi, Nobuo, Ijichi, Takeshi, Mikamo, Hiroshi, Kurata, Akira, Moroi, Masao, iijima, raisuke, Crabtree, Tami, Min, James K, and Nakanishi, Rine

Published
2022
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30. Nitroglycerine-induced vasodilation in coronary and brachial arteries in patients with suspected coronary artery disease

Author

Maruhashi, Tatsuya, Kajikawa, Masato, Nakashima, Ayumu, Iwamoto, Yumiko, Iwamoto, Akimichi, Oda, Nozomu, Kishimoto, Shinji, Matsui, Shogo, Higaki, Tadanao, Shimonaga, Takashi, Watanabe, Noriaki, Ikenaga, Hiroki, Hidaka, Takayuki, Kihara, Yasuki, Chayama, Kazuaki, Goto, Chikara, Aibara, Yoshiki, Noma, Kensuke, and Higashi, Yukihito

Published
2016
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31. The reliability and utility of on-site CT-derived fractional flow reserve (FFR) based on fluid structure interactions: comparison with FFRCT based on computational fluid dynamics, invasive FFR, and resting full-cycle ratio.

Author

Fujii, Yuto, Kitagawa, Toshiro, Ikenaga, Hiroki, Tatsugami, Fuminari, Awai, Kazuo, and Nakano, Yukiko

Subjects
COMPUTATIONAL fluid dynamics, CORONARY arteries, CORONARY artery disease, COMPUTED tomography, FLUIDS, MUCOCUTANEOUS lymph node syndrome
Abstract

Fractional flow reserve (FFR) derived off-site by coronary computed tomography angiography (CCTA) (FFRCT) is obtained by applying the principles of computational fluid dynamics. This study aimed to validate the overall reliability of on-site CCTA-derived FFR based on fluid structure interactions (CT-FFR) and assess its clinical utility compared with FFRCT, invasive FFR, and resting full-cycle ratio (RFR). We calculated the CT-FFR for 924 coronary vessels in 308 patients who underwent CCTA for clinically suspected coronary artery disease. Of these patients, 35 patients with at least one obstructive stenosis (> 50%) detected on CCTA underwent both CT-FFR and FFRCT for further investigation. Furthermore, 24 and 20 patients underwent invasive FFR and RFR in addition to CT-FFR, respectively. The inter-observer correlation (r) of CT-FFR was 0.93 (95% confidence interval [CI] 0.85–0.97, P < 0.0001) with a mean absolute difference of − 0.0042 (limits of agreement − 0.073, 0.064); 97.3% of coronary arteries without obstructive lesions on CCTA had negative results for ischemia on CT-FFR (> 0.80). The correlation coefficient between CT-FFR and FFRCT for 105 coronary vessels was 0.87 (95% CI 0.82–0.91, P < 0.0001) with a mean absolute difference of − 0.012 (limits of agreement − 0.12, 0.10). CT-FFR correlated well with both invasive FFR (r = 0.66, 95% CI 0.36–0.84, P = 0.0003) and RFR (r = 0.78, 95% CI 0.51–0.91, P < 0.0001). These data suggest that CT-FFR can potentially substitute for FFRCT and correlates closely with invasive FFR and RFR with high reproducibility. Our findings should be proven by further clinical investigation in a larger cohort. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Predictive value of plaque morphology assessed by frequency-domain optical coherence tomography for impaired microvascular perfusion after elective stent implantation: the intracoronary electrocardiogram study

Author

Ikenaga, Hiroki, Kurisu, Satoshi, Nakao, Tsukasa, Kono, Shingo, Sumimoto, Yoji, Watanabe, Noriaki, Shimonaga, Takashi, Higaki, Tadanao, Iwasaki, Toshitaka, Mitsuba, Naoya, Ishibashi, Ken, Dohi, Yoshihiro, Fukuda, Yukihiro, and Kihara, Yasuki

Published
2018
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43. Relationship Between Attenuated Plaque Identified by Intravascular Ultrasound and Thrombus Formation After Excimer Laser Coronary Angioplasty.

Author

Nakano, Takayuki, Ikenaga, Hiroki, Takeda, Atsushi, Morita, Yuichi, Higashihara, Tasuku, Watanabe, Noriaki, Sada, Yoshiharu, and Nakano, Yukiko

Subjects
*EXCIMER lasers, *INTRAVASCULAR ultrasonography, *THROMBOSIS, *ANGIOPLASTY, *PERCUTANEOUS coronary intervention, *ATHERECTOMY
Abstract

Excimer laser coronary angioplasty (ELCA) has been reported to be a safe and effective atherectomy device in percutaneous coronary intervention (PCI). However, thrombotic complications after ELCA have been occasionally observed. In this study, we evaluated the impact of attenuated plaque on thrombus formation and transient no-reflow after ELCA. This study enrolled 58 lesions in 56 patients who underwent PCI with ELCA. It was a retrospective observational study at a single center. All lesions were imaged by intravascular ultrasound (IVUS) before and immediately after ELCA. On the plaque with ultrasound attenuation, attenuation angle per millimeter and attenuation length were measured. ELCA-induced thrombus was detected by IVUS, and transient no-reflow after ELCA was recorded. Thrombus was detected in 14 lesions (30 %), and transient no-reflow occurred in 3 lesions (5 %). Lesions with thrombus had a higher mean attenuation angle (median [interquartile range] 142° [112°-152°] vs. 64° [0°-115°]; p = 0.001), maximum attenuation angle (209° [174°-262°] vs. 86° [0°-173°]; p < 0.001), and longer attenuation length (12 mm [8 mm–17 mm] vs. 2 mm [0 mm–5 mm]; p < 0.001). Lesions with thrombus leading to transient no-reflow had a longer lipid length and a significantly higher troponin I level after PCI. IVUS-identified attenuated plaque was strongly correlated with ELCA-induced thrombus. Furthermore, attenuation length may predict transient no-reflow. • Attenuated plaque strongly correlated with thrombus formation after ELCA. • No-reflow after ELCA caused periprocedural myocardial infarction. • Attenuation length may predict no-reflow after ELCA. • IVUS is useful to predict the risk of thrombotic events after ELCA. [ABSTRACT FROM AUTHOR]

Published
2023
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49. Comparison of Gender-Specific Mortality in Patients

Author

Ishihara, Masaharu, Inoue, Ichiro, Kawagoe, Takuji, Shimatani, Yuji, Miura, Fumiharu, Nakama, Yasuharu, Dai, Kazuoki, Ootani, Takayuki, Ooi, Kuniomi, Ikenaga, Hiroki, Miki, Takashi, Nakamura, Masayuki, Kishimoto, Shinji, and Sumimoto, Youji

Published
2011
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