Ross Operation for Prosthetic Aortic Valve Endocarditis with Paravalvular Abscess / 日本心臓血管外科学会雑誌

An 18-year-old man underwent a Ross operation for the treatment of prosthetic aortic valve endocarditis with extensive perivalvular tissue destruction. Postoperatively, he developed poststernotomy methicillin-resistant <i>Staphylococcus aureus</i> mediastinitis, which was treated with one-staged irrigation, debridement and omental transfer. After 3 years of follow-up, he is doing well without any sign of infection or a graft failure.

Long-Term Results of Patchplasty for True Thoracic Aortic Aneurysm and the Effectiveness of Open Stents in Recurring Cases / 日本心臓血管外科学会雑誌

We reviewed 24 cases of patchplasty for true thoracic aortic aneurysm performed in our hospital up to July 2001. The size of the aneurysm in the ascending aorta was 6.0cm (1 case), and the mean size in the aortic arch was 2.5±0.5cm (4 cases), that in the distal arch was 4.7±1.7cm (11 cases), and that in the descending aorta was 3.7±0.5cm (8 cases). The hospital mortality rate was 12.5% (3 patients out of 24). The causes of death were multiple organ failure, cerebral bleeding and sepsis. In the long-term results, 2 patients had recurrence, but there were no late deaths in relation to the aneurysmal recurrence. We performed open stent operations for severe adhesion and pulmonary dysfunction in the aneurysmal recurrence cases. The postoperative course of these cases was uneventful. The open stent was useful for the treatment of the aneurysmal recurrence in the distal arch.

Transaortic Endovascular Stent Grafting: An Acceptable Alternative for Aortic Arch Surgery / 日本心臓血管外科学会雑誌

Endovascular grafting via the aortic arch, a novel alternative method for aortic aneurysm repair, was performed in 18 patients with aortic arch or distal arch aneurysms. For cerebral protection, selective or retrograde cerebral perfusion was used during delivery and deployment of the stented graft through the aortotomy. Selective cerebral perfusion was performed through both cerebral arteries and the left subclavian artery. Throughout this procedure, the aorta was filled with carbon dioxide to prevent the spinal arteries from air embolism. Two patients were lost, one due to myocardial infarction and one due to pneumonia. Endoluminal leakage was found in 2 patients, for which reoperation was required. However, no cerebral or spinal complications were observed in this series. Thus we conclude that endovascular stent grafting via the aortic arch is an acceptable alternative for the aortic arch or distal arch aneurysm repair with little risk of cerebral or spinal complications.

Risk Factors and Treatment for Mediastinitis in Internal Mammary Artery Grafting, with Particular Regard to Diabetic Patients / 日本心臓血管外科学会雑誌

The internal mammary artery (IMA) has been widely used in CABG due to the excellent long-term results. However, the extensive use of bilateral IMA grafting has been believed to increase operative morbidity and mortality. This study was designed to determine if bilateral IMA grafting in diabetic patients increased the likelihood of mediastinitis. We analyzed the data of 386 consecutive patients who underwent isolated CABG in 1992 to 1996. The definitions of sternal wound complications are as follows, (1) mediastinal dehiscence and (2) mediastinal wound infection. Subtypes include superficial wound infection and deep wound infection (mediastinitis). Among these patients 97 received unilateral IMA grafts and 289 did bilateral IMA grafts. mediastinitis did not occur in any subjects. The occurrence rate of mediastinal dehiscence and superficial wound infection was 7.2% (7/97) for bilateral IMA grafting, 7.3% (21/289) for unilateral IMA grafting. No patients died of wound complications. The occurrence rate of mediastinal dehiscence and superficial wound infections were 12.0% (4/33) for bilateral IMA grafting in diabetic patients, 12.0% (14/117) for unilateral IMA grafting in diabetic patients. That of this complications was 4.7% (3/64) for bilateral IMA grafting in non-diabetic patients, 4.1% (7/172) for unilateral IMA grafting in diabetic patients, without significant differences in wound complication. Bilateral IMA grafting in diabetic patients carried no great risk of mediastinitis, but diabetes mellitus itself was a great risk for mediastinitis.

A Case Report of Mediastinitis after Subtotal Graft Replacement of the Thoracic Aorta / 日本心臓血管外科学会雑誌

A 57-year-old man underwent subtotal graft replacement of the thoracic aorta for aneurysms of both the ascending and descending aorta. On the 20th post-operative day, pus was found to be draining from the sternotomy wound. The wound was opened and irrigated with 2% Povidoneiodine solution for a total of 3 months. Culture of the pus from the irrigation revealed <i>Staphylococcus epidermidis</i>. When there were no clinical indications of infection and wound cultures were negative, the necrotic sternum and surrounding tissue were debrided and an omental graft was placed in the cavity. Upon follow-up examination, the patient is doing well 10 months after the initial surgery.

A Case of Proximal Descending Aortic Aneurysm with Floating Mural Thrombi Detected by Intraoperative Direct Echography / 日本心臓血管外科学会雑誌

We treated a 62-year-old man with aneurysms of the descending thoracic aorta (45mm: proximal, 60mm: distal). We evaluated the intima of the aorta by intraoperative direct echography using a small probe (finger tip size), which detected floating mural thrombi in the proximal descending aorta. Therefore we chose the proximal and distal open technique with retrograde cerebral circulation under deep hypothermia during graft replacement of the descending aorta. There was no complication during or after surgical treatment.

Surgery for Aortic Valve Disease Combined with Coronary Artery Disease and Arrhythmia / 日本心臓血管外科学会雑誌

Aortic valve disease is frequently associated with coronary artery disease and arrythmia. Recently, the mortality of aortic valve replacement has decreased because of more effective myocardial protection, so operations that combine aortic valve replacement and coronary bypass grafting or the Maze procedure for atrial fibrillation have been performed. We treated 25 patients undergoing aortic valve replacement combined with coronary bypass grafting and 2 patients undergoing aortic valve replacement with a modified Maze procedure from 1990 to 1996. Among the patients undergoing aortic valve replacement combined with coronary bypass grafting, there were no perioperative deaths and no development of coronary artery disease, malfunction of mechanical valve, or thrombosis. Two patients undergoing aortic valve replacement with a modified Maze procedure and tricuspid valve annuloplasty have reverted to sinus rhythm from atrial fibrillation with no anti-arrythmic agent. Surgery for combined aortic valve disease and coronary artery disease or arrythmia resulted in an improvement of late survival and quality of life.