Midterm Results of Radial Artery Graft in Coronary Artery Bypass Surgery: AC Bypass Technique versus Y-Graft Technique / 日本心臓血管外科学会雑誌

We treated 162 patients by isolated CABG with a left internal thoracic artery (LITA) anastomosed to the left anterior descending artery and a radial artery anastomosed to the circumflex artery between August 1996 and December 2002. Late angiograms were performed 6 to 65 months (21.7±15.8) after the operation. The purpose of this study was to compare midterm results of radial arteries anastomosed to the side wall of LITA (group Y) with those anastomosed to the aorta (group AC). There were no operative deaths in either group and no difference in the postoperative complication rate including cerebral infarction. The early patency of group Y was lower than that of group AC (group AC: 97.8%, group Y: 87.1%, <i>p</i>=0.017), and also the late patency of group Y was significantly lower than that of group AC (group AC: 90.9%, group Y: 36.4%, <i>p</i>=0.0008). All of the early patent radial artery grafts in group AC were patent on late angiograms, but 3 of the 25 anastomoses in group Y which were clearly patent on early angiograms later showed a string sign later. When using a radial artery graft in circumflex artery territory, we recommend an aorto-coronary bypass graft rather than Y-graft.

A Successful Operative Case of Delayed Repair for Acute Traumatic Aortic Rupture / 日本心臓血管外科学会雑誌

Although recent progress in surgery for acute traumatic rupture of the thoracic aorta is encouraging, hospital mortality remains high due to associated fatal lesions. Delayed repair of acute aortic rupture, after management of critical lesions, has been reported in the literature with increasing frequency. We present here a successful operative case of a 54-year-old-woman with acute traumatic aortic rupture. She was admitted to the intensive care unit with loss of consciousness, rib fracture and lung contusion in order to investigate additional critical lesions under strict control of systolic blood pressure under 120mmHg. After completion of all diagnostic procedures, aortic repair was performed 2 days after the accident. The intima of the aorta was found to be disrupted for two thirds of the circumference and pseudoaneurysm was diagnosed. A gelatin-coated vascular prosthesis with one branch was interposed under cardiopulmonary bypass during which general heparinization, systemic hypothermia (20°C) and retrograde brain perfusion method were used. She recovered uneventfully and was discharged 2 weeks after the operation.