A Case in Which Mitral Valve Replacement Was Performed for Recurrent Severe Mitral Regurgitation by Single Leaflet Device Attachment (SLDA) after MitraClip / 日本心臓血管外科学会雑誌

After a MitraClip was implanted for mitral regurgitation (MR), we experienced a case in which mitral valve replacement was performed for recurrent severe MR because of a detached MitraClip. The case was an 82-year-old woman. The MitraClip was implanted for severe MR and regurgitation was controlled to a mild level, but one month after the operation, symptoms of heart failure appeared, and single leaflet device attachment (SLDA) with severe MR was observed on the echocardiogram. As the heart failure symptoms recurred, surgical mitral valve replacement was performed. Because of severe kyphosis, the left atrial approach with a midline sternum incision made it difficult to achieve a good operative field and this was changed intraoperatively to a transseptal approach. The MitraClip was firmly fused with the anterior leaflet A2, so it was judged that removal of the clip was difficult and valve repair was impossible ; it was thus decided to replace the valve. The mark of the MitraClip could be observed on the posterior leaflet, and it appeared to have been inserted for only about 1-2 mm. A bioprosthetic valve was implanted, preserving the posterior leaflet. There were no problems in weaning the patient from cardiopulmonary bypass. The postoperative course was uneventful, and she was discharged on the 14th day after the operation. Valve repair is difficult in a case with a merged SLDA after insertion of a MitraClip, and valve replacement needs to be performed, so it is important to pay attention to the attachment of the MitraClip.

Cardiac Tumor Resection through Right Mini-thoracotomy / 日本心臓血管外科学会雑誌

We herein report a case of cardiac tumor resection through a right mini-thoracotomy. A 48-year-old man exhibited no symptoms. A mass was detected incidentally in the right atrium on computed tomography. We performed resection under cardiopulmonary bypass through a right mini-thoracotomy. Histopathological examination confirmed that this tumor was a lipoma. The patient's postoperative recovery was uneventful. He was discharged on postoperative day 6. As cardiac tumor resection through right mini-thoracotomy is minimally invasive, this approach may be useful for surgery in cases of benign cardiac tumors.

A Case of EVAR for Mycotic Aneurysm Rupture / 日本心臓血管外科学会雑誌

We report a case of mycotic aneurysm treated with endovascular aneurysm repair (EVAR). An 80-year-old man was admitted to a local hospital with high fever and lower back pain. Pyogenic spondylitis and psoas muscle abscess were diagnosed. Klebsiella pneumoniae was confirmed by blood culture. Treatment with intravenous antibiotics was not effective and contrast computed tomography (CT) scan showed an enlargement of the abscess and an abdominal aortic rupture. The patient was immediately transferred to our hospital. Laboratory tests showed an elevated C-reactive protein (12.3 mg/dl) and WBC (10,400/μl). Mycotic abdominal aneurysm rupture was diagnosed by CT scan. He underwent an emergency EVAR with an Excluder® (aorta extender). Intraoperative angiography showed a ruptured abdominal aorta. After operation, he was treated with intravenous minocycline and ampicillin, and the size of the abscess reduced without any endoleak on enhanced CT imaging. After intravenous antibiotics therapy for 4 weeks, we switched to oral antibiotics (minocycline and ciprofloxacin) and continued them for 6 months. As of 2 years after the surgery, there are no signs of infection or recurrence.

Mitral Valve Replacement via Right Thoracotomy for Ischemic Mitral Regurgitation in a Patient with Prior Coronary Artery Bypass Grafting / 日本心臓血管外科学会雑誌

We report a case of redo mitral valve replacement via right thoracotomy for ischemic mitral regurgitation after coronary artery bypass grafting. An 81-year-old woman with a history of multiple coronary artery bypass grafting was admitted to our institute for treatment of severe ischemic mitral valve regurgitation. She had a history of repeated hospitalization for heart failure and complained of worsening dyspnea. Coronary angiography showed patent coronary grafts. Echocardiography revealed severe mitral regurgitation with leaflet tethering and posteroinferior wall asynergy. The patient underwent mitral valve replacement (Mosaic Bioprosthesis 27 mm) via right thoracotomy approach with ventricular fibrillation under moderate hypothermia. The ventricular fibrillation time was 57 min, and the cardiopulmonary bypass time was 126 min. The patient's postoperative recovery was uneventful. She was discharged on postoperative day 19. Right thoracotomy approach provided excellent exposure of the mitral valve and minimized the risk of repeat sternotomy, including injury of previous bypass grafts, injury of right ventricle and significant hemorrhage.

Successful Medical Treatment of Prosthetic Valve Endocarditis with a Perivalvular Abscess / 日本心臓血管外科学会雑誌

A 68-year-old man visited our hospital with a high fever with chills 4 years after aortic valve replacement. Streptococcal species were cultured with a venous blood culture. An echocardiogram and a cardiac computed tomography (CT) scan revealed a perivalvular abscess (11 mm×15 mm). Because his prosthetic valve functioned well, he was treated with intravenous ampicillin and gentamicin. Cardiac CT scan performed at 6 weeks showed the perivalvular abscess to have disappeared and he was discharged from the hospital. He is free from recurrence of the abscess 20 months after the initiation of therapy.