2.A Simple Modified Infarct Exclusion Technique for a Patient with Large Ventricular Septal Perforation
Kazuhiro Hisamoto ; Masaaki Toyama ; Masanori Katoh ; Yuji Kato ; Yukiharu Sugimura
Japanese Journal of Cardiovascular Surgery 2013;42(2):168-171
A 79 year-old woman was given a diagnosis of acute myocardial infarction and was immediately transferred to our hospital by a helicopter. Cardiologists successfully revascularized the occluded left anterior descending artery which was considered to be the care of this case. After that, they detected a large ventricular septal perforation by transthoracic echocardiography. We performed repair of the ventricular septal perforation 4 days later, with a modified infarct exclusion technique. Residual shunt flow was not seen by echocardiography after the operation. This patient recovered uneventfully and was discharged on postoperative day 55.
3.Surgical Treatment for Thoracoabdominal Aneurysm with Severely Calcified Aorta
Noriko Tamaoka ; Nobuaki Hirata ; Takashi Nojiri ; Akihiko Yagura ; Masaaki Kato
Japanese Journal of Cardiovascular Surgery 2008;37(2):120-123
We report a 59-year-old chronic hemodialysis patient with a thoracoabdominal aortic aneurysm, in whom the entire aortic wall and visceral branches were severely calcified. Using a staged operation approach, the celiac trunk and superior mesenteric artery were first bypassed with a composite graft made from a saphenous vein Y-graft and ePTFE. Next, we inserted a custom-made stent-graft, however, there was poor attachment at both the proximal and distal ends due to the severely calcified aortic wall. As a result, we used additional two stent-grafts. His postoperative course was good, and the CT scan performed one year after operation showed no endoleak.
4.Successful Endovascular Treatment of Ureteroarterial Fistula and Anastomotic Pseudoaneurysms
Akiyoshi Mikuriya ; Katsuyuki Hoshina ; Masaaki Kato ; Nobukazu Ohkubo
Japanese Journal of Cardiovascular Surgery 2012;41(3):144-147
A 79-year-old man who had undergone aneurysmectomy and graft replacement for an abdominal aortic aneurysm developed abdominal distension and massive hematuria. A computed tomography (CT) scan revealed the presence of anastomotic pseudoaneurysms and an ureteroarterial fistula between the ureter and iliac artery (distal anastomotic pseudoaneurysm). On admission, the patient's vital signs were stable. The patient was considered a high-risk case for open surgery because of his renal dysfunction which required dialysis, chronic heart failure and hostile abdomen. We initially recommended open surgery because of possible graft infection, however, the patient refused to undergo the high-risk open surgery. We performed emergency surgery for the ureteroarterial fistula via coverage with off-label use of the stent-graft leg. Intraoperative angiography revealed that there was no leakage. After 1 month, we confirmed that the inflammatory laboratory data was normalized, subsequently, we performed endovascular re-intervention for the proximal aortic anastomotic pseudoaneurysm. The endoleak was finally repaired after off-label use of the stent-graft (aortic cuff exclusion) twice within 2 months. The patient did not develop any operation-related adverse events for 4 months, but subsequently he died of pneumonia that developed from a common cold. Thus, we successfully performed endovascular treatment for a high-risk patient with an ureteroarterial fistula and pseudoaneurysms, without any surgery-related infection.
5.A Case Report of Abdominal Aortic Aneurysm Associated with Crossed-Fused Ectopia of the Kidney.
Tomohiro Mizuno ; Masaaki Toyama ; Noriyuki Tabuchi ; Kazuyuki Kuriu ; Masanori Kato
Japanese Journal of Cardiovascular Surgery 2001;30(2):92-94
A rare case of abdominal aortic aneurysm associated with crossed-fused ectopic kidney in a 74-year-old man is reported. On enhanced CT scans, the maximum diameter of his infrarenal aortic aneurysm was 55mm, and he lacked a right kidney. A crossed ectopic kidney was fused to the lower part of the left kidney. On preoperative examinations, only one feeding artery to the ectopic kidney separated from the right common iliac artery. However, laparotomy confirmed the presence of three aberrant renal arteries, the middle one of which was very slim. Aneurysmectomy and a bifurcated artificial graft replacement was performed. After proximal anastomosis, the two larger aberrant renal arteries were reconstructed under renal protection with intermittent infusion of cold Ringer's solution. The smallest aberrant renal artery was ligated. Postoperatively, this patient recovered without any complications. In operations for abdominal aortic aneurysm associated with renal anomaly including ectopic kidney, horseshoe kidney, and pelvic kidney, it is important to elucidate the anatomy of aberrant renal arteries preoperatively, and reconstruct as many of these arteries as possible. This report is apparently the fourth on abdominal aortic aneurysm associated with crossed ectopic kidney.
6.A Case of Emergency Surgery for a Huge Primary Right Atrial Angiosarcoma with Right Ventricular Failure and Shock
Yuji Kato ; Masanori Kato ; Mitsuhisa Kotani ; Kazuhiro Hisamoto ; Yukiharu Sugimura ; Masaaki Toyama
Japanese Journal of Cardiovascular Surgery 2011;40(6):322-325
We encountered a rare case of a 75-year-old woman who fell into right ventricular failure and shock with a comparatively rapid course due to a huge primary right atrial angiosarcoma occupying the right atrium. An emergency surgical excision of the tumor was performed and the right atrium was reconstructed with an EPTFE patch under cardiopulmonary bypass. On account of the positive margin, postoperative radiotherapy was added. There was no local recurrence, but adjuvant chemotherapy was performed for multiple lung and liver metastases 14 months after surgery. Primary cardiac angiosarcomas are extremely rare and have dismal prognoses. Although a complete surgical resection is the cornerstone of treatment, multidisciplinary therapy may improve patient outcomes.
7.Early Structural Valve Deterioration of Third-Generation Porcine Bioprosthesis in Patients
Mitsuhisa Kotani ; Masaaki Toyama ; Masanori Katoh ; Yuji Kato ; Kazuhiro Hisamoto ; Yukiharu Sugimura
Japanese Journal of Cardiovascular Surgery 2010;39(6):339-342
A 78-year-old woman underwent mitral valve replacement (MVR) with bioprosthesis in 1984. By 1997 the valve had become dysfunctional and was replaced with a Mosaic valve. Dyspnea on exertion occurred in 2005 and a systolic murmur was detected at that time. Echocardiography revealed severe mitral regurgitation (MR). The mitral valve was replaced for the third time. The explanted valve showed commissural dehiscence at the stent position and calcified leaflets. The mitral valve of a 70-year-old man was replaced with a bioprosthesis in 1986, and again with a Mosaic valve in 1997 because the original bioprosthesis had become dysfunctional. Seven years later, a systolic murmur appeared and echocardiography revealed severe MR. The valve was replaced for the third time. A leaflet tear was found in the removed valve. The Mosaic valve is a third generation porcine bioprosthesis that reportedly has excellent long-term durability. However, in these cases, the Mosaic valves deteriorated prematurely, and no obvious causes of this early structural deterioration could be identified. Continued long-term follow up is necessary, and the possibility of premature deterioration should be considered when selecting bioprostheses.
8.Surgical Repair of Various Pseudoaneurysms in 2 Patients with Vasculo-Behçet Disease
Yukiharu Sugimura ; Mitsuhisa Kotani ; Masanori Katoh ; Yuji Kato ; Kazuhiro Hisamoto ; Masaaki Toyama
Japanese Journal of Cardiovascular Surgery 2010;39(6):363-366
Vasculo-Behçet disease (VBD) is a special type of Behçet disease (BD) involving some vascular disorders like aneurysmal formation, arterial occlusion, and venous thrombosis in various vessels. VBD has a poor prognosis due to aneurysmal rupture or recurrence of vascular disorders despite optimal treatment. However, definite diagnosis in BD is made on the basis of clinical features, and early diagnosis is difficult. We report 2 patients whose first clinical symptoms were femoral-pseudoaneurysms. They received a diagnosis of VBD after surgery. The first patient was a 69-year-old man, who underwent autologous-vein patch closure of a perforated region in the left femoral artery. One year later, he had a pseudoaneurysm of the right profunda femoris artery, which was ligated. The second patient was a 51-year-old man, who underwent the interposition of the saphenous vein for defective artery due to left superficial femoral-pseudoaneurysm.
9.Surgical Treatment of Abdominal Aortic Aneurysm Coexisting with Coronary Artery Disease.
Susumu Manabe ; Masaaki Toyama ; Isamu Kawase ; Masanori Kato ; Tomoya Yoshizaki ; Haisong Wu ; Mitsuhisa Kotani
Japanese Journal of Cardiovascular Surgery 2003;32(1):1-5
This study was designed to evaluate the optimal surgical treatment strategy for abdominal aortic aneurysm (AAA) coexisting with coronary artery disease (CAD). Twenty-six patients (21 men and 5 women with a mean age of 72.6±3.7 years old) who required surgical treatment of both conditions were examined. Eleven patients underwent a one-stage operation. Four of them had on-pump CABG and 7, including 3 high-risk-patients, underwent off-pump CABG. There were no operative mortalities, but 3 patients had severe morbidity (respiratory failure, acute renal failure, pneumonia). Fifteen patients underwent a two-stage operation. None of them had rupture of the AAA during the interval between the two operations, but 2 patients with large AAA (more than 6cm in diameter) required emergency operation due to impending rupture of the AAA. There was no operative mortality, but one patient suffered acute renal failure. One-stage operation for low-risk patients seems to be a safe and reasonable strategy. One-stage operation for high-risk patients should be performed cautiously, and off-pump CABG is especially useful in such patients.
10.A Case of Stentless Aortic Valve Reoperation for Severe Aortic Regurgitation due to Dilation of the Sinotubular Junction
Kazuhiro Hisamoto ; Masaaki Toyama ; Masanori Katoh ; Mitsuhisa Kotani ; Yuji Kato ; Yukiharu Sugimura
Japanese Journal of Cardiovascular Surgery 2012;41(1):25-28
A 72-year-old woman underwent a double aortic valve replacement with the Freestyle aortic bioprosthesis and subcoronary implantation with the Mosaic mitral bioprosthesis because of rheumatic multivalvular heart disease in 2000. During her annual follow-up, her Sinotubular junction was observed to have gradually increased in diameter on echocardiography and computed tomography. Therefore, 9 years after surgery we performed a reoperation for severe aortic regurgitation. Intraoperatively, the stentless bioprosthesis was found to be structurally intact. We believe that the dilation of the Sinotubular junction associated with a stentless bioprosthesis in the subcoronary position have caused her severe aortic regurgitation.