Prevalence of Dental Disease in Patients Undergoing Heart Valve Surgery / 日本心臓血管外科学会雑誌

Bacteremia from dental disease is the most important cause of infective endocarditis in patients with heart valve disease. However, the prevalence of dental disease in patients undergoing valve surgery has not been clarified. One hundred thirty-seven patients had a dental check-up before heart valve surgery, 82 patients (59.9%) had significant dental disease which could have caused bacteremia. All patients with the dental disease underwent extraction preoperatively. There was neither complication in extraction nor any influence on heart valve surgery. Postoperative hospital stay was not prolonged due to the extraction. During the mean follow-up period of 30 months, no infective endocarditis was seen. The prevalence of dental disease was high in patients undergoing heart valve surgery. Preoperative treatment of dental disease did not have a negative impact on the postoperative course and hospital stay in heart valve surgery.

Effect of Diabetes Mellitus on Early and Mid-Term Results after Off-Pump CABG / 日本心臓血管外科学会雑誌

It has been reported that diabetes mellitus is a significant risk factor for adverse outcomes after conventional CABG using cardiopulmonary bypass. However, the effects of diabetes on postoperative outcomes after off-pump coronary artery bypass grafting (OPCAB) are unclear. The effects of diabetes on early and mid-term results were studied by comparing the outcomes between 82 patients (65±5 years) with diabetes and 112 patients (68±11 years) without diabetes. The diabetic group included a greater preoperative presence of renal insufficiency (22.0% vs 8.9%, <i>p</i>=0.011) and history of cerebral vascular accident (25.6% vs 11.6%, <i>p</i>=0.012). Strategies, including graft choice, were not changed by presence of diabetes. The use of bilateral internal thoracic arteries (70.7% diabetes vs 67.0% nondiabetes), and frequency of total arterial bypass were similar in the 2 groups. The number of distal anastomoses was higher in the diabetic group (3.0±0.9 vs 2.7±0.9, <i>p</i>=0.042). The operation time and frequency of blood transfusion were similar in both groups. There was no hospital death in either group. Although mechanical ventilation time and postoperative ICU stay did not differ, hospital stay was significantly longer in the diabetic group (16.2 vs 13.3 days, <i>p</i>=0.0085). Postoperative major complications including atrial fibrillation were not significantly different between the 2 groups. Minor wound infection occurred in 2 patients, 1 in each group. There was no mediastinitis in either group. During the mean follow-up period of 20.8 months (1-39), there were two sudden deaths in the diabetic group, but no other cardiac death in either group. Cardiac event-free rate did not differ between the 2 groups. Although hospital stay in diabetic patients was longer than that in nondiabetic patients, early and mid-term results of OPCAB were not significantly affected by diabetes mellitus.

A Re-Expanding Descending Thoracic Aortic Aneurysm after Stent-Grafting / 日本心臓血管外科学会雑誌

A descending thoracoaortic aneurysm excluded by stent-grafting had expanded during a period of one and a half years. There was no endoleakage but there was shortening of the stent-landing on both proximal and distal sides. Aneurysm seemed to be pressed by blood pressure through the graft in TEE. The aneurysm was replaced by an artificial graft through a left heart bypass. Because ESP diminished during the operation, VIth intercostal arteries were reconstructed immediately, and CSF drainage was performed. Following this procedure there was no paraplegia.

Successful Treatment of Acute Type A Aortic Dissection with Intestinal Necrosis / 日本心臓血管外科学会雑誌

A 59-year-old man presented with severe abdominal pain. CT scan showed a type A aortic dissection and pericardial effusion. As cardiac tamponade was present, emergency total arch replacement was performed. Because of his symptom, we added an exploratory laparotomy, which revealed intestinal necrosis. Therefore, necrotic intestine 4.5m in length was resected. After intensive care, he began oral feeding on the 25th day and was discharged on the 76th day postoperatively.

Combined Coronary Artery Bypass Grafting, Abdominal Aortic Repair and Aortic Valve Replacement in a Case with Porcelain Aorta / 日本心臓血管外科学会雑誌

A 73-year-old woman was admitted to undergo three simultaneous operations: aortic valve replacement (AVR), coronary artery bypass grafting (CABG) and abdominal aortic aneurysm repair. She had previously undergone percutaneous catheter intervention in the left coronary anterior descending artery. Computed tomography revealed an abdominal aortic aneurysm 5cm in diameter. Aortic valve stenosis (AS) was shown with a pressure gradient of 60mmHg, and 90% stenosis of the distal right coronary artery was also shown. CT scan and aortography revealed porcelain ascending aorta. The patient underwent simultaneous operations because of severe AS, coronary artery disease and abdominal aortic aneurysm. An aortic cannula was placed in a position higher in the ascending aorta with no calcification. Cardiopulmonary bypass was started using a two-staged venous cannula through the right atrium. At first, AVR was performed with cardioplegic solution and ice slush. Because it was difficult to inject the cardioplegic solution into the coronary artery selectively due to the calcified orifice of coronary artery, we closed it immediately by removing the calcified intima of the porcelain aorta after completion of AVR. The second cardioplegic solution was injected through the ascending aorta. Next, CABG to RCA was performed using the right gastroepiploic artery without anastomosis to the ascending aorta. Cardiac surgery was first performed, followed by abdominal aortic aneurysm repair after discontinuation of cardiopulmonary bypass. The patient was extubated the next day and stayed for two days in the intensive care unit. She is very well now one year after the operation.

A Case of Large Anastomotic Pseudoaneurysms at Both Sites Following Prosthetic Graft Replacement between Aorta and Left External Iliac Artery / 日本心臓血管外科学会雑誌

A 84-year-old man was admitted with an abdominal tumor. Prosthetic graft replacement between the aorta and the left external iliac artery was performed 17 years previously. CT scan and angiography showed a large anastomotic pseudoaneurysms at the sites of proximal and distal anastomosis. A Y graft prosthesis replacement was performed. The size of the proximal anastomotic pseudoaneurysm was 7×6×5cm, and that of the distal anastomotic pseudoaneurysm was 15×10×10cm. They resulted from cutting at anastomosis. Large anastomotic pseudoaneurysms at both sites is rare.