Minimally Invasive Coronary Artery Bypass Grafting with Mini-sternotomy and Cardiopulmonary Bypass / 日本心臓血管外科学会雑誌

To assess the indications and clinical outcome of minimally invasive coronary artery bypass grafting with mini-sternotomy and cardiopulmonary bypass (MICS-CABG) for patients with multiple coronary artery disease, left main trunk stenosis and/or concomitant heart diseases, we examined results in 17 patients (mean age 62.5 years) who underwent MICS-CABG. The average number of distal anastomoses was 2.2 anastomoses/patient. The category of the coronary lesions was the left main trunk in 6 patients, triple vessel disease in 7, double vessel disease in 3, and left anterior descending artery stenosis with aortic regurgitation in 1 patient. Each operative procedure through the mini-sternotomy was easily and completely performed in all patients. By means of postoperative coronary angiography, full patency without stenosis in all grafts was recognized in 95.0%. Immediately after the MICS-CABG, all patients showed quick recovery of respiration, and postoperative admission duration significantly decreased compared with standard CABG with full sternotomy. The above results suggest that MICS-CABG is one of the procedures of choice for patients with multiple coronary artery disease, left main trunk stenosis and/or concomitant heart diseases.

Sternotomy Approach in a Case of Giant Ascending Aortic Aneurysm and Annuloaortic Ectasia Previously Operated for Pure Pulmonary Stenosis / 日本心臓血管外科学会雑誌

A 29-year-old man, who had undergone valvotomy for pure pulmonary stenosis at 6 months of age, was admitted to our institution for surgical treatment of a giant ascending aortic aneurysm and annuloaortic ectasia. Chest MRI revealed a 14-cm ascending aneurysm in contact with the sternum. After establishing femoro-femoral bypass for hypothermia, a left lateral thoracotomy was perfomed at the 4th intercostal space. Pulmonary artery cannulation was performed for left heart venting, and the proximal aortic arch was dissected for aortic cross-clamping. Median sternotomy was performed under circulatory arrest at 18°C and the aortic arch was opened. Under retrograde cerebral perfusion, the proximal arch was replaced by an artificial graft, and then aortic root replacement was completed using a composite graft under CPB. The postoperative course was uneventful, and the patient was discharged on the 37th postoperative day. He has been well without any complications. This case suggests that our method of approach to the giant aortic aneurysm with sternal adhesion and aortic regurgitation, and the use of extracorporeal circulation in view of the annuloaortic ectasia is effective and safe in case of reoperation.

Intermediate Results of Translocation of the Aortic Valve for Periannular Abscess Due to Active Infective Endocarditis and Introduction of a Sutureless Translocation Technique / 日本心臓血管外科学会雑誌

Periannular abscess and mycotic aneurysm due to infective endocarditis are very difficult conditions to treat surgically. Beginning in 1983, we introduced a translocation technique on 9 such cases. In particular, 7 patients who underwent a new sutureless translocation technique all showed an uneventful course and were discharged. There was no hospital death, but four patients died in the late period (2 heart failure, 1 ventricular tachycardia and 1 thrombotic valve). The sutureless translocation method consists of insertion of a composite valve into the ascending aorta (a ring was detached from an intraluminal ringed graft and a prosthetic valve was sutured to it at that point) and coronary artery bypass grafting to the right and left coronary arteries. Our new technique was simple, required only a short aortic clamping time (mean 173.9min) and there was no significant bleeding. This new translocation technique provides a solution for the treatment of periannular abscess and mycotic aneurysm due to infective endocarditis.