心臓手術後に術操作に伴う右冠動脈閉塞が判明した2症例

Right Coronary Artery Occlusion after Cardiac Surgery：Two Cases

要旨

　心臓手術後右冠動脈閉塞が判明した2症例を経験した。原因は三尖弁輪形成術またはメイズ手術と考えられた。症例1はカテーテル治療を，症例2は保存的経過観察を行った。心臓手術に伴う右冠動脈閉塞はまれであるが，人工心肺離脱困難や不安定な循環動態の一因として念頭に置く必要がある。

　We report two cases of iatrogenic right coronary artery occlusion after cardiac surgery, in which tricuspid annuloplasty and maze procedures were considered as possible causes. Patient 1, a 71-year-old man, was successfully treated with percutaneous revascularization, and Patient 2, a 67-year-old woman, was successfully treated with conservative management. Although rare, right coronary artery occlusion causes difficulty in weaning from cardiopulmonary bypass and hemodynamic instability.