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Your search keyword '"Ishikawa, Toshiyuki"' showing total 676 results
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676 results on '"Ishikawa, Toshiyuki"'

6. Feasibility of anchoring active fixation quadripolar lead to the main body of the dilated coronary sinus in a patient with persistent left superior vena cava: a case report.

Author

Taguchi, Yuka, Hosoda, Junya, Horigome, Akira, and Ishikawa, Toshiyuki

Subjects
VENA cava superior, CARDIAC pacing, VENTRICULAR ejection fraction, CARDIAC pacemakers, VEINS (Geology), SCHOLARLY periodical corrections
Abstract

Background Coronary sinus (CS) lead placement in persistent left superior vena cava (PLSVC) cases is challenging because of the poor backup force of the guiding catheter within the enlarged CS. Active fixation Quadripolar leads (Attain Stability™ Quad 4798, Medtronic) can expand choice to CS branches with limited access; however, no cases of anchoring to the main body of the CS have been published to date. Case summary We describe a case of cardiac resynchronization therapy pacemaker upgrade in a 79-year-old female who developed pacing-induced cardiomyopathy after pacemaker implantation via the right superior vena cava (SVC) for atrioventricular block eight years ago wherein PLSVC was revealed during the procedure. Retrograde giant CS angiography via SVC confirmed the lateral vein ostium. Attain Stability Quadripolar lead was selected; however, due to the tortuousness and stenosis of the target vein, the proximal electrodes could not advance into the target vein. Therefore, the side helix between the third and fourth electrodes was crimped to the anterior wall of the giant CS using the distal end curve of the subselection catheter and successfully screwed into the main body of the CS. At more than 6 months, left ventricular ejection fraction improved without lead dislodgement. Discussion Fixation of CS lead to the main body of the dilated CS was feasible by devising a guiding catheter and a subselection catheter. Nevertheless, the safety of active fixation lead retraction after long-term indwelling in CS is unknown and it should be carefully considered. [ABSTRACT FROM AUTHOR]

Published
2025
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9. Skeletal muscle mass is associated with glycemic variability in patients with ST-segment elevation myocardial infarction

Author

Gohbara, Masaomi, Iwahashi, Noriaki, Sato, Ryosuke, Akiyama, Eiichi, Konishi, Masaaki, Nakahashi, Hidefumi, Kataoka, Shunsuke, Takahashi, Hironori, Kirigaya, Jin, Minamimoto, Yugo, Okada, Kozo, Matsuzawa, Yasushi, Maejima, Nobuhiko, Hibi, Kiyoshi, Kosuge, Masami, Ebina, Toshiaki, Sugano, Teruyasu, Ishikawa, Toshiyuki, Tamura, Kouichi, and Kimura, Kazuo

Published
2021
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11. Clinical impact of admission urinary 8-hydroxydeoxyguanosine level for predicting cardiovascular mortality in patients with acute coronary syndrome

Author

Gohbara, Masaomi, Iwahashi, Noriaki, Nakahashi, Hidefumi, Kataoka, Shunsuke, Takahashi, Hironori, Kirigaya, Jin, Minamimoto, Yugo, Akiyama, Eiichi, Okada, Kozo, Matsuzawa, Yasushi, Konishi, Masaaki, Maejima, Nobuhiko, Hibi, Kiyoshi, Kosuge, Masami, Ebina, Toshiaki, Sugano, Teruyasu, Ishikawa, Toshiyuki, Tamura, Kouichi, and Kimura, Kazuo

Published
2021
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18. Comparison of anti-inflammatory effects of rivaroxaban vs. dabigatran in patients with non-valvular atrial fibrillation (RIVAL-AF study): multicenter randomized study

Author

Kikuchi, Shinnosuke, Tsukahara, Kengo, Sakamaki, Kentaro, Morita, Yukiko, Takamura, Takeshi, Fukui, Kazuki, Endo, Tsutomu, Shimizu, Makoto, Sawada, Reimin, Sugano, Teruyasu, Himeno, Hideo, Kobayashi, Syunichi, Arakawa, Kentaro, Mochida, Yasuyuki, Tsunematsu, Takashi, Shigemasa, Tomohiko, Okuda, Jun, Ishikawa, Toshiyuki, Kimura, Kazuo, and Tamura, Kouichi

Published
2019
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22. Subcutaneous air entrapment after subcutaneous implantable cardioverter defibrillator implantation evaluated by computed tomography.

Author

Taguchi, Yuka, Ishikawa, Toshiyuki, Matsumoto, Katsumi, Narikawa, Masatoshi, Okazaki, Yoshinori, Miyagawa, Shuichi, Horigome, Akira, and Hosoda, Junya

Subjects
*CHEST physiology, *PROSTHETICS, *ELECTRIC countershock, *BODY mass index, *COMPUTED tomography, *SCIENTIFIC observation, *ARTIFICIAL implants, *TREATMENT effectiveness, *HOSPITALS, *DESCRIPTIVE statistics, *LONGITUDINAL method, *ELECTROCARDIOGRAPHY, *IMPLANTABLE cardioverter-defibrillators, *SUBCUTANEOUS emphysema, *GAS embolism, *AIRWAY (Anatomy)
Abstract

Background: Inappropriate shock (IAS) caused by subcutaneous air entrapment (AE) in an early period after subcutaneous implantable cardioverter defibrillator (S‐ICD) implantation has been reported, however, no detailed data on air volume are available. We evaluated the subcutaneous air volume after implantation and its absorption rate one week after implantation. Methods: Patients who underwent S‐ICD implantation in our hospital received chest CT scans immediately after implantation and followed up 1 week later. The total subcutaneous air volume, air around the generator, the distal electrode, and the proximal electrode within 3 cm were calculated using a three‐dimensional workstation. Fat areas at the level of the lower edge of the generator were also analyzed. Result: Fifteen patients received CT immediately after implantation. The mean age was 45.6 ± 17.9 (66.7% of men), and the mean body mass index was 24.3 ± 3.3. The three‐incision technique was applied in seven patients and two‐incision technique was in the latter eight patients. The mean total subcutaneous air volume was 18.54 ± 7.50 mL. Air volume around the generator, the distal electrode, and the proximal electrode were 11.05 ± 5.12, 0.72 ± 0.72, and 0.88 ± 0.87 mL, respectively. Twelve patients received a follow‐up CT 1 week later. The mean total subcutaneous air was 0.25 ± 0.45 mL, showing a 98.7% absorption rate. Conclusion: Although subcutaneous air was observed in all patients after S‐ICD implantation, most of the air was absorbed within 1 week, suggesting a low occurrence of AE‐related IAS after a week postoperation. [ABSTRACT FROM AUTHOR]

Published
2024
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28. Beneficial effect of early infusion of landiolol, a very short-acting beta-1 adrenergic receptor blocker, on reperfusion status in acute myocardial infarction

Author

Kiyokuni, Masayoshi, Konishi, Masaaki, Sakamaki, Kentaro, Kawashima, Chika, Narikawa, Masatoshi, Doi, Hiroshi, Iwata, Kiwamu, Tomari, Sakie, Nakayama, Naoki, Komura, Naohiro, Mitsuhashi, Takayuki, Yano, Hideto, Sugano, Teruyasu, Ishigami, Tomoaki, Endo, Tsutomu, Ishikawa, Toshiyuki, Yamanaka, Takeharu, and Kimura, Kazuo

Published
2016
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37. A Simple Risk Score to Differentiate Between Coronary Artery Obstruction and Coronary Artery Spasm of Patients With Acute Coronary Syndrome Without Persistent ST-Segment Elevation

Author

Gohbara, Masaomi, primary, Iwahashi, Noriaki, additional, Okada, Kozo, additional, Ogino, Yutaka, additional, Hanajima, Yohei, additional, Kirigaya, Jin, additional, Minamimoto, Yugo, additional, Matsuzawa, Yasushi, additional, Nitta, Manabu, additional, Konishi, Masaaki, additional, Hibi, Kiyoshi, additional, Kosuge, Masami, additional, Ebina, Toshiaki, additional, Sugano, Teruyasu, additional, Ishikawa, Toshiyuki, additional, Tamura, Kouichi, additional, and Kimura, Kazuo, additional

Published
2022
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39. Magnetic thickness measurement for various iron steels using magnetic sensor and effect of electromagnetic characteristics

Author

Tsukada, Keiji, Hayashi, Minoru, Kawakami, Taisei, Adachi, Shoya, Sakai, Kenji, Kiwa, Toshihiko, Ishikawa, Toshiyuki, Saari, Mohd Mawardi, Hori, Kengo, Hisazumi, Kazumasa, Tominaga, Tomonori, Tsukada, Keiji, Hayashi, Minoru, Kawakami, Taisei, Adachi, Shoya, Sakai, Kenji, Kiwa, Toshihiko, Ishikawa, Toshiyuki, Saari, Mohd Mawardi, Hori, Kengo, Hisazumi, Kazumasa, and Tominaga, Tomonori

Abstract

The diagnosis and prevention of the deterioration of iron-steel infrastructure has become an important social issue in recent years. The thickness measurement technique (extremely low-frequency eddy current testing (ELECT)) using a magnetic sensor for detecting steel corrosion at extreme frequency ranges has been previously reported. Using the calibration curves based on the correlation between the phase of the detected magnetic signal and the plate thickness, the plate thickness reduction caused by corrosion can be estimated from the detected phase signal. Iron-steel materials have large changes in electromagnetic characteristics; therefore, the reference calibration data for each type of iron-steel are required for plate thickness estimation. In this study, the effect of electromagnetic characteristics on the magnetic thickness measurement was investigated to improve the thickness estimation. Four types of iron-steel plates (SS400, SM400A, SM490A, and SMA400AW) with thicknesses ranging from 1 mm to 18 mm were measured by ELECT, and the phase change at multiple frequencies of each plate were analyzed. The shift in the phase and linearity regions of the calibration curves for each type of steel plate was observed. To analyze this shift phenomenon, the electromagnetic characteristics (permeability mu and conductivity sigma) of each type of steel were measured. Compared with the permeability mu and conductivity sigma of each steel plate in the applied magnetic field strength range, the product (sigma mu) for various steel plates decreased in the following order: SM400 > SS400 >SMA400AW > SM490A. The product of mu and sigma is related to the skin depth, indicating the electromagnetic wave attenuation and eddy current phase shift in the material. Therefore, each shift in the calibration curve of each type of iron steel is explained by the changes in the parameters sigma and mu.

Published
2022

40. Thickness Measurement at High Lift-Off for Underwater Corroded Iron-Steel Structures Using a Magnetic Sensor Probe

Author

Adachi, Shoya, Hayashi, Minoru, Kawakami, Taisei, Ando, Yuto, Wang, Jin, Sakai, Kenji, Kiwa, Toshihiko, Ishikawa, Toshiyuki, Tsukada, Keiji, Adachi, Shoya, Hayashi, Minoru, Kawakami, Taisei, Ando, Yuto, Wang, Jin, Sakai, Kenji, Kiwa, Toshihiko, Ishikawa, Toshiyuki, and Tsukada, Keiji

Abstract

Infrastructure facilities that were built approximately half a century ago have rapidly aged. Steel sheet piles, the inspection object in this study, are severely corroded, resulting in cave-in damages at wharfs. To solve such a problem, non-destructive inspection techniques are required. We previously demonstrated plate thickness measurement using extremely low-frequency eddy current testing. However, when the steel sheet piles are located in water, shellfish adhere to their surface, causing a lift-off of several tens of millimeters. Therefore, this large lift-off hinders the thickness measurement owing to fluctuations of magnetic signals. In this study, sensor probes with different coil diameters were prototyped and the optimum size for measuring steel sheet piles at high lift-off was investigated. Using the probes, the magnetic field was applied with a lift-off range from 0 to 80 mm, and the intensity and phase of the detected magnetic field were analyzed. Subsequently, by increasing the probe diameter, a good sensitivity was obtained for the thickness estimation with a lift-off of up to 60 mm. Moreover, these probes were used to measure the thickness of actual steel sheet piles, and measurements were successfully obtained at a high lift-off.

Published
2022

47. (Covers to) Nihon kaisan chōrikuzu.

Author

Ishikawa, Toshiyuki

Subjects
Japan
Abstract

Covers dark green paper on soft cardboard. Text in black., Japanese date Genroku 4 [1691]. In color. Folded. Wood block print. In Japanese. Title from: Nihon kohan chizu shūsei / Kurita Mototsugu. p.34. Covers Matsumae to Ryūkyū and Tsushima. Shows points of interest pictorially. Includes lists of main shrines and place names, seasonal diagrams, distance charts and legend. Shows daimyo and kokudaka.

Published
1691

48. Nihon kaisan chōrikuzu.

Author

Ishikawa, Toshiyuki

Subjects
Japan
Abstract

Japanese date Genroku 4 [1691]. In color. Folded. Wood block print. In Japanese. Title from: Nihon kohan chizu shūsei / Kurita Mototsugu. p.34. Covers Matsumae to Ryūkyū and Tsushima. Shows points of interest pictorially. Includes lists of main shrines and place names, seasonal diagrams, distance charts and legend. Shows daimyo and kokudaka.

Published
1691

50. Nihon oezu / Ishikawa Ryushen. Genroku 3 [1690]

Author

Ishikawa, Toshiyuki and Sagamiya, Tahe

Subjects
Japan
Abstract

1 map : 81 x 167 cm., folded in cover 29 x 22 cm. Title added by hand. Wood block print. In Japanese. Covers Matsumae to Ryukyu and Tsushima. Shows points of interest pictorially. Includes lists of main shrines and place names, seasonal diagrams, distance charts and legend. Shows kokudaka. Relief shown pictorially. East Asian Library call number: Ca4.

Published
1690

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