1.A Case of Successful Anticoagulant Therapy for Acute Thrombosis Following Mitral Valve Replacement under V-A ECMO
Akitoshi YAMADA ; Ryo TOHMA ; Masanobu SATO ; Yoshihisa MORIMOTO ; Kunio GAN ; Tatsuro ASADA
Japanese Journal of Cardiovascular Surgery 2025;54(3):109-113
A 76-year-old woman, with a history of secundum atrial septal defect (ASD) patch closure 11 years earlier, presented with loss of appetite and dyspnea. She was treated for heart failure due to aortic regurgitation (AR), mitral regurgitation (MR), tricuspid regurgitation (TR), and atrial fibrillation (Af). Upon transfer to our department, she went into shock, leading to the introduction of V-A ECMO and IABP. Emergency surgeries, including aortic valve replacement (AVR), mitral valve replacement (MVR), tricuspid valve annuloplasty (TAP), and left atrial appendage closure, were performed. A second surgery for hemostasis was necessary, and V-A ECMO was removed on the second postoperative day. Transesophageal echocardiography revealed mitral bioprosthetic valve thrombosis. The patient was treated with heparin and warfarin, resulting in improved pressure gradients and removal of IABP by the seventh day. The sternum was closed on the seventeenth day, and she was transferred to the general ward on the thirty-ninth day. This case demonstrates the effective use of anticoagulant therapy for early valve thrombosis after mitral valve replacement under V-A ECMO.
2.Totally Endoscopic 3D Mitral Valve Plasty for a Patient with Loeys-Dietz Syndrome Type 3 and a Narrow Chest
Ryo TOHMA ; Hidekazu NAKAI ; Akitoshi YAMADA ; Yoshihisa MORIMOTO ; Kunio GAN ; Tatsuro ASADA
Japanese Journal of Cardiovascular Surgery 2025;54(6):276-279
Loeys-Dietz syndrome (LDS) is a rare genetic disorder characterized by systemic connective tissue abnormalities. Among its subtypes, LDS type 3 is associated with SMAD3 gene mutations and often presents with vascular and skeletal abnormalities. Narrow chest is a relative contraindication for minimally invasive cardiac surgery (MICS), yet this approach can be advantageous in connective tissue disorders where repeated surgeries may be anticipated. A 63-year-old woman with a previously unreported SMAD3 variant was diagnosed with LDS type 3. She presented with severe mitral regurgitation due to A2-3 prolapse. Her skeletal features included a narrow chest (anteroposterior diameter: 5 cm), scoliosis, and pectus excavatum. Totally endoscopic 3D mitral valve plasty was performed via a right minithoracotomy using a 2-port, 1-window approach. Mitral repair was successfully completed using artificial chordae and ring annuloplasty. Adequate exposure was achieved despite the narrow chest by retracting the pericardium and displacing the aorta using gauze packing. The mitral valve was clearly visualized using the 3D endoscopic camera, allowing safe repair of the A2-3 prolapse with four artificial chordae and a 29-mm Tailor ring. The patient was extubated 3.5 hours postoperatively and had an uneventful recovery except for transient atrial fibrillation. She was discharged on postoperative day 13 in sinus rhythm. Totally endoscopic MICS-MVP is feasible and beneficial even in patients with challenging thoracic anatomy due to connective tissue disease. It enables chest wall preservation and minimizes surgical trauma, which is particularly advantageous for LDS patients with lifelong surgical risk.
3.Surgical Strategy for Blunt Aortic Injury
Hiroki Arase ; Yoshihisa Morimoto ; Takaki Sugimoto
Japanese Journal of Cardiovascular Surgery 2015;44(1):53-55
Objective : Blunt aortic injury often accompanies other organ injuries, and therefore requires an appropriate lifesaving surgical strategy. Patients : During the past 8 years, blunt aortic injury was reviewed, based on 5 lifesaving cases experienced in our hospital. There were 3 men and 2 women (aged 57-70, average 64.2). The Injury Severity Scores were 13-25 (an average of 17.2). Intervention : Regarding our strategy, stabilization of vital signs should be at first aimed by intensive primary care, concomitantly with diagnostic procedures. When stabilization of vital signs is obtained, a delayed operation would be considered after damage control resuscitation. As for 3 of these 5 cases, an emergency surgery was performed because of distinct aortic hemorrhage with instability of vital signs, and stent graft repair was applied based on anatomical indication in two cases. In the other 2 cases, primary diagnosis suggested aortic injury by the bone fracture pieces. Damage control was conducted following stabilization of vital signs, and delayed surgery was done with removal of the bone fracture pieces and repair of aortic injury, which improved activities of daily living. Results : All cases recovered with no particular complication, and were discharged on 9-32 days average postoperatively. Conclusion : Blunt aortic injury is often fatal, but the appropriate diagnosis and treatment can play an important role in obtaining the good results.
4.A Case of Visceral Ischemia Associated with Acute Stanford Type B Aortic Dissection.
Yoshihisa Morimoto ; Nobuhiko Mukouhara ; Tatsuro Asada ; Tetsuya Higami ; Hidefumi Ohbo ; Kunio Gan ; Kazuhiko Iwahashi ; Syuichi Ozawa
Japanese Journal of Cardiovascular Surgery 1996;25(6):415-418
A 36-year-old man was transported to our hospital with severe anterior chest and abdominal pain of sudden onset which was diagnosed as Stanford type B acute aortic dissection with visceral ischemia. Aortogram revealed occlusion of celiac, superior mesenteric and inferior mesenteric arteries with aortic dissection. At first, fenestration of the abdominal aorta above the inferior mesenteric artery was immediately carried out, but the abdominal pain continued. Therefore, bypass grafting for the superior mesenteric artery with saphenous vein was performed the next day. The patient's postoperative course was complicated with acute renal failure and paralytic ileus, which were treated medically and he was discharged in good condition.


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