A Reoperation for Pseudoaneurysm of the Proximal Anastomotic Site and Distal Enlargement of the Dissecting Arch and Descending Aorta after Ascending Aortic Replacement for Acute Type A Aortic Dissection / 日本心臓血管外科学会雑誌

<p>We report a case of reoperation for proximal pseudoaneurysmal formation of the ascending aorta and distal enlargement of the dissecting arch and descending aorta after ascending aorta replacement for acute type A aortic dissection. The patient was a 47-year-old man who had undergone ascending aorta replacement and aortic valve replacement for acute type A aortic dissection three months previously. Pseudoaneurysm of the ascending aorta and enlargement of the dissecting arch and descending aorta were revealed by computed tomography. Therefore, we performed extensive replacement of the aortic root, arch and descending aorta. Median re-sternotomy with left anterolateral thoracotomy the (“Door open method”) was applied as the surgical approach. After reconstructing the aortic root using the modified Bentall procedure, we replaced the arch and descending aorta using antegrade continuous coronary perfusion with systemic blood through the composite graft of the aortic root under non-cardioplegic arrest. Despite the long duration of extracorporeal circulation, the duration of cardioplegic arrest was relatively short, and the postoperative cardiac function was not deteriorated at all. The patient is currently doing well with no problems at 1.5 years after the surgery. The Door open method was a useful approach providing good operative exposure in this case requiring extensive replacement of the thoracic aorta. Antegrade continuous blood coronary perfusion was useful for performing the arch and descending aortic replacement under non-cardioplegic arrest, and it was a reliable strategy for ensuring myocardial protection and avoiding prolonged duration of cardiac ischemia.</p>

Two Successful Reoperations for Ascending Aortic Pseudoaneurysm Long after Cardiovascular Surgery / 日本心臓血管外科学会雑誌

We describe two repeated operations to treat ascending aortic pseudoaneurysms. The first was emergency patch closure of the ascending aorta due to impending rupture 8 years after an operation for type I aortic dissection under hypothermic circulatory arrest. The second was endovascular repair using a fenestrated stent graft 7 years after coronary artery bypass grafting. No specific guidelines have been established regarding optimal management for such patients. We believe that individualized management is safer, especially for repeated operations.

An Operative Case of Papillary Fibroelastoma of the Aortic Valve / 日本心臓血管外科学会雑誌

An echocardiogram revealed a mobile mass attached to the left coronary cusp of the aortic valve in an 81-year-old woman. The tumor was surgically removed without valve replacement. The tumor was whitish in color, with a sea anemone-like appearance, and it measured 10 mm in maximum dimension. It was histopathologically defined as papillary fibroelastoma (PFE), and the postoperative course was uneventful. Primary cardiac tumors are rare, and the majority are myxomas. However recent advances in noninvasive examination and surgery may increase the detection of PFE, which occurs most frequently on the endocardial surface of the cardiac valve. We report a case of cardiac PFE with a review of the pertinent literature.

Investigation of Mitral Valve Replacement in a Patient with Mitral Valve Stenosis Who Complicated with Myelodysplastic Syndrome and Left Atrial Thrombosis / 日本心臓血管外科学会雑誌

Patients with myelodysplastic syndrome (MDS) most commonly have refractory anemia accompanied by various degrees of granulocytopenia and thrombocytopenia. At the time of cardiac surgery, both major infections and bleeding are severe complications in patients with pancytopenia due to MDS. However, there were very few patients with MDS who had undergone open-heart surgery. We reported a case of mitral valve replacement in a patient with MDS. A 68-year-old man with valvular heart disease and MDS, with a platelet count of 1.9×10⁴/mm³, underwent successful mitral valve replacement. The mitral valve was replaced by an SJM 25 A prosthesis after resection of left atrial thrombosis using cardiopulmonary bypass. Platelets were transfused after the bypass. Perioperative hemorrhage was moderate and postoperative course was uneventful. We evaluated platelet function by Sonoclot coagulation and a platelet function analyzer. We did not need a large amount of transfusion of red blood cells and platelets, and prevented major bleeding and severe wound infections in the acute postoperative state.

Coronary Artery Bypass Grafting for Patients in Whom Preoperative Angiography Determined That the In Situ Left Internal Thoracic Artery Could Not Be Used / 日本心臓血管外科学会雑誌

Use of the internal thoracic artery for myocardial revascularization has regained general acceptance because it offers better long-term results than do venous conduits. However, according to angiographic studies, it has been reported that atherosclerotic changes in the internal thoracic artery occurred in 1-5% of patients with coronary artery disease, although, generally, it is considered that atherosclerotic changes in internal thoracic artery are rare. From January 1998 to August 2001, of the 274 patients who underwent coronary artery bypass grafting, it was estimated that the left internal thoracic artery could not be used for coronary revascularization by preoperative angiography in 7 patients (7/262=2.7%). Two hundred sixty-two patients underwent preoperative angiography to evaluate the grafts for coronary revascularization. All were men and age at the time of operation ranged from 62 to 81 years (mean, 68.6 years). The reason for the left internal thoracic artery being useless were occlusion or stenosis of the subclavian artery in 4 and stenosis or occlusion of the left internal thoracic artery in 3. One patient needed an emergency operation. Four patients had a history of myocardial infarction, 3 patients had hypertension, 2 patients had diabetes mellitus, 4 patients had hyperlipidemia, 1 patient had aortitis and 3 patients had a history of percutaneous transluminal coronary angioplasty. There were 4 patients with peripheral vascular disease. Four right internal thoracic arteries, 9 radial arteries and 6 gastroepiploic arteries were used for coronary revascularization. A composite Y graft (right internal thoracic artery-radial artery) was used in 3 patients, and sequential bypass was performed in the other 3 patients. The total number of distal anastomoses was 2.7±1.0/patient. The angiographic patency of the distal anastmoses was 94.7% (18/19). One patient required intra-aortic balloon pumping postoperatively for perioperative myocardial infarction (Max CK-MB 200IU/<i>l</i>). All other patients had an uneventful postoperative course. In conclusion, although the internal thoracic artery is a protective vessel, there is a certain extent of atherosclerosis, which correlates with known risk factors. Our observations should not preclude use of the internal thoracic artery, but they should be considered for patients who are at risk for atherosclerotic changes of the internal thoracic artery. We considered that it is important to evaluate condition of <i>in situ</i> arterial grafts for patients with coronary artery disease preoperatively. Although further studies are required, <i>in situ</i> arterial grafting with sequential arterial conduit and composite arterial graft were associated with excellent results and achieved complete revascularization.

Tuberculous Thoracic Aneurysm Which Ruptured into the Lung / 日本心臓血管外科学会雑誌

We present a rare case of tuberculous thoracic aneurysm which ruptured into the lung. A 66-year-old woman who has been treated for lung tuberculosis and spondylocace was referred to our hospital for treatment of a descending thoracic aneurym confirmed by enhanced CT scan. On the 6th hospital day, she had massive hemoptysis and her systolic pressure dropped to 70mmHg. Emergency operation was performed under an F-F bypass. The saccular aneurysm was excised and surrounding infected tissue was debrided. UBE graft was inserted in situ and totally covered with omentum. The pathological diagnosis of the specimen was tuberculous aortic aneurysm. The postoperative course was uneventful. Good reconstruction and omental vessels around the replaced graft were revealed by postoperative angiogram. Two years later she is well. The omental covering of the replaced graft was a useful method for preventing graft infection.