KEIO RESEARCHERS INFORMATION SYSTEM

Papers 【 Display / hide 】

Papers 【 Display / hide 】

• A Safe Incision Line in Commando Surgery for Prosthetic Valve Infective Endocarditis with Dense Adhesions: A Case Report

  Kaneyama H., Koizumi K., Ikebata K., Waga M., Hashizume K., Shimizu H.

  SN Comprehensive Clinical Medicine 8 ( 1 )  2026.12

  　View Summary

  Introduction: Commando surgery carries a substantial risk of bleeding owing to its multiple operative steps, prolonged cardiac arrest time, and the need for many sutures to the fragile tissues of the heart. Prosthetic valve infective endocarditis, especially after multiple valve replacements, can be difficult to treat surgically because of the high degree of adhesions. Case Presentation: We report a 66-year-old man who underwent a Commando procedure for recurrent prosthetic valve endocarditis, following two previous double valve replacement surgeries. Adequate exposure was achieved without injury to surrounding structures by selecting an incision line that avoided extensive dissection of dense adhesions. Bleeding was further minimized by reconstructing the aortic, left atrial, and right atrial walls while preserving adherent tissue as much as possible. Conclusion: The route of incision and reconstruction we have shown in this study may allows for reproducible Commando surgery even in the presence of strong adhesions.

  • Access to Document (DOI)

• Visceral segment interrupted constraining suture in physician-modified endografts for dissecting thoracoabdominal aortic aneurysms

  Hashizume K., Mori M., Yamazaki M., Yagami T., Haida H., Shimizu H.

  Journal of Vascular Surgery Cases Innovations and Techniques 12 ( 3 )  2026.06

  　View Summary

  Severe true lumen narrowing in chronic dissecting thoracoabdominal aortic aneurysms (dTAAAs) can compromise accurate fenestration alignment and hinder reliable bridging of the renovisceral branches. We evaluated the safety and feasibility of fenestrated endovascular aortic repair using a physician-modified endograft incorporating a visceral segment interrupted constraining suture. This permanent diameter-constraining modification is intended to stabilize the endograft within a narrowed true lumen and improve target vessel access. Sixteen patients with chronic dTAAA underwent elective repair using a low-profile Zenith Alpha Thoracic device. All 60 renovisceral branches were successfully bridged, resulting in 100% intraoperative technical success, defined as completion of the planned procedure with aneurysm sac sealing, with no 30-day mortality. Three patients required early reintervention for endoleak (1 type IC; 2 type IIIC). Follow-up imaging through 12 months demonstrated durable aneurysm exclusion and sustained branch patency. In this early experience, a visceral segment interrupted constraining suture provided reproducible diameter control and facilitated target vessel access in complex dTAAA treated by physician-modified endograft-based fenestrated endovascular aortic repair.

  • Access to Document (DOI)

• Standardization for Minimally Invasive Combined Aortic and Mitral Valve Surgery via a Right Minithoracotomy

  Yamazaki M., Takahashi T., Matsumoto Y., Haida H., Kimura N., Hashizume K., Ito T., Shimizu H.

  Annals of Thoracic Surgery Short Reports 4 ( 1 ) 123 - 126 2026.03

  　View Summary

  Surgeons have been reluctant to adopt minimally invasive combined aortic and mitral valve surgery through a minithoracotomy because of its complexity and prolonged cardiopulmonary bypass and aortic cross-clamping times. Our technique was designed to provide a close and frontal surgical visual field without the need for long-shafted specialized surgical instruments, thereby allowing a standardized and well-visualized surgical visual field in many cases. Here we describe the implementation of our minimally invasive combined aortic and mitral valve surgical procedure through a right minithoracotomy facilitated by the superior septal approach for mitral valve access.

  • Access to Document (DOI)

• Direct aorta implantation technique of microaxial blood pump using a coronary artery bypass grafting anastomosis assist device

  Harada D., Aoyagi Y., Kasai M., Mori M., Hashizume K., Shimizu H.

  Jtcvs Techniques 35 2026.02

  • Access to Document (DOI)

• Aorticopulmonary paraganglioma resected via a transaortic approach: A case report

  Sugino K., Suzuki S., Suzuki T., Okubo Y., Haida H., Masai K., Kaseda K., Hashizume K., Shimizu H., Asakura K.

  Jtcvs Techniques  2026

  • Access to Document (DOI)

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Reviews, Commentaries, etc. 【 Display / hide 】

Reviews, Commentaries, etc. 【 Display / hide 】

• Percutaneous coronary intervention with orbital atherectomy after transcatheter aortic valve replacement

  Yashima F., Sato M., Matsumura H., Yoshijima N., Hashizume K., Shimoji K.

  Cardiovascular Intervention and Therapeutics 40 ( 1 ) 189 - 190 2025.01

  ISSN  18684300

  • Access to Document (DOI)

• Reply: Hybrid aortic arch replacement as innovative treatment option for acute type A aortic dissection

  Hashizume K., Matsuoka T., Mori M., Takaki H., Koizumi K., Kaneyama H., Funaishi K., Kuroo K., Shimizu H.

  Jtcvs Techniques 18   24 - 25 2023.04

  • Access to Document (DOI)

Presentations 【 Display / hide 】

Presentations 【 Display / hide 】

• Staged repairの限界とPrimary repairにおける工夫

  Aeba Ryou, Katougi Toshiyuki, Hashizume Kenichi, Iino Yoshimi, Koizumi Kiyoshi, Anzai Tomohiro, Inoue Shinya, Hotoda Kentarou, Yoshitake Akihiro, Matayoshi Hideki, Yozu Ryouhei

  [Domestic presentation]  第55回日本胸部外科学会総会, 

  2002.10

  , 

  Oral presentation (general)

• 成長期における左側房室弁置換後の至適再弁置換時期

  Iino Yoshimi, Katougi Toshiyuki, Aeba Ryou, Hashizume Kenichi, Koizumi Kiyoshi, Anzai Tomohiro, Inoue Shinya, Hotoda Kentarou, Matayoshi Hideki, Yoshitake Akihiro, Shimizu Hideyuki, Yozu Ryouhei

  [Domestic presentation]  第55回日本胸部外科学会総会, 

  2002.10

  , 

  Oral presentation (general)

• 一過性大動脈虚血モデルを用いたラジカル消去薬MCI－186の脊髄障害に対する保護効果の実験的検討

  Hashizume Kenichi, Ueda Toshihiko, Shimizu Hideyuki, Yozu Ryouhei

  [Domestic presentation]  第55回日本胸部外科学会総会, 

  2002.10

  , 

  Oral presentation (general)

• pull-through法を用いた弓部下行置換例

  Koizumi Kiyoshi, Ueda Toshihiko, Shimizu Hideyuki, Hotoda Kentarou, Iino Yoshimi, Hashizume Kenichi, Anzai Tomohiro, Inoue Shinya, Matayoshi Hideki, Yoshitake Akihiro, Yozu Ryouhei

  [Domestic presentation]  第123回日本胸部外科学会関東甲信越地方会, 

  2002.09

  , 

  Oral presentation (general)

• 術前VT/VFを認めたDor手術の一例

  Matayoshi Hideki, Shin Hankei, Hashizume Kenichi, Mori Mitsuharu, Yoshitake Akihiro, Okamoto Kazuma, Suzuki Ryou, Anzai Tomohiro, Yozu Ryouhei

  [Domestic presentation]  第123回日本胸部外科学会関東甲信越地方会, 

  2002.09

  , 

  Oral presentation (general)

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Courses Taught 【 Display / hide 】

Courses Taught 【 Display / hide 】

• CLINICAL CLERKSHIP IN CARDIOVASCULAR SURGERY

  2026

• LECTURE SERIES, SURGERY

  2026