관상동맥 우회술후 관상동맥 조영검사 소견

Coronary Angiography after Coronary artery Bypass Grafting

  • 최진호 (성균관대학교 의과대학 삼성서울병원 흉부외과) ;
  • 박계현 (성균관대학교 의과대학 삼성서울병원 흉부외과) ;
  • 전태국 (성균관대학교 의과대학 삼성서울병원 흉부외과) ;
  • 이영탁 (성균관대학교 의과대학 삼성서울병원 흉부외과) ;
  • 박표원 (성균관대학교 의과대학 삼성서울병원 흉부외과) ;
  • 채헌 (성균관대학교 의과대학 삼성서울병원 흉부외과) ;
  • 이종태 (경북대학교 의과대학 흉부외과학교실)
  • Choi, Jin-Ho (Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, SungKyunkwan University School of Medicine) ;
  • Park, Kay-Hyun (Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, SungKyunkwan University School of Medicine) ;
  • Jun, Tae-Gook (Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, SungKyunkwan University School of Medicine) ;
  • Lee, Young-Tak (Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, SungKyunkwan University School of Medicine) ;
  • Park, Pyo-Won (Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, SungKyunkwan University School of Medicine) ;
  • Chae, Hurn (Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, SungKyunkwan University School of Medicine) ;
  • Lee, Jong-Tae (Department of Chest Surgery, School of Medicine, Kyoung-Book National University)
  • 발행 : 2002.03.01

초록

배경: 그간 관상동맥 우회수술후의 관상동맥 조영술 결과는 주로 우회도관의 개존률에 초점을 맞추어 보고되어 왔다. 그러나 수술후의 관상동맥 조영술 검사로부터 얻을 수 있는 유용한 정보의 폭은 훨씬 넓으며, 이는 수술 전략 설정에 큰 도움을 줄 수 있으리라 생각된다. 대상 및 방법: 1994년 11월부터 1999년 3월까지 관상동맥 우회수술을 시행받고 퇴원한 환자 448명중 1개월 이상 경과후 관상동맥 조영술 추적이 이루어진 73명을 대상으로 하였다. 수술후 평균 10.6개월 경과시 관상동맥 조영술 검사가 시행되었고 검사 이유는 협심증의 잔존이나 재발이 54명, 심근관류검사나 초음파검사상의 이상이 13명, 단순한 추적목적이 6명이었다. 결과: 우회도관 개존률은 단순추적검사 환자들에서는 80.9%(내흉동맥 100%, 복재정맥 75.0%), 심근 허혈이 있는 것으로 판단된 환자들에서는 61.6%(내흉동맥 81.1%, 복재정맥 55.3%)였다. 50명(68.5%)의 환자에서 우회도관 조성 근위부의 관상동맥 내경협착이 20% 이상 진행한 곳이 한 군데 이상 나타났다. 수술 전 완전 폐쇄되지 않았던 201개의 관상동맥 분지중 95개(47.3%)에서 협착 정도가 20%이상 진행하였고 이중 64개(31.8%)는 완전 폐쇄로 진행하였다. 협착이 진행하는 빈도는 수술후 경과한 시간이나 수술전의 협착정도와는 연관이 없었고 우회도관이 폐쇄된 경우(36.3%)보다 개통되어 있는 상태(56.5%)에서 더 높게 나타났다(p<0.05). 내흉동맥과 복재정맥의 비교시 개존률(83.3% vs 56.6%) 뿐만 아니라 경피적 중재술이 필요한 경우 성공적으로 시행될 확률도 큰 차이를 보였다(100% vs 62%, p<0.05). 결론: 관상동맥 우회술 후 비교적 조기에 우회도관 조성 근위부의 관상동맥 협착이 진행하는 빈도가 상당히 높은 것으로 나타난 만큼 복재정맥의 불량한 장기 개존률을 고려할 때 중등도 이하의 협착을 가진 관상동맥 분지의 우회로 조성에는 신중을 기할 필요가 있다고 판단된다. 또한 본 연구 결과 관상동맥 우회수술시 좌전하행지 우회로의 중요성과 함께 내흉동맥의 우수성을 확인할 수 있었다.

Background: There have been many reports of coronary angiographic findings after coronary bypass grafting, most of which are focused on the graft patency rate of the bypass conduits. However, postoperative angiography can provide numerous informations other than patency rates that are useful for establishing operative strategy. Material and Method: We studied 73 patients in whom coronary angiography was done after more than 1 month of CABG. Mean interval from the operation to coronary angiography was 10.6 months and the reasons for coronary angiography follow up were residual or recurrent angina in 54 patients, abnormalities on myocardial perfusion scan or echocardiography in 13 patients, and for simple follow up in 6 patients. Result: Overall graft patency rate was 80.9% (internal thoracic artery 100%, saphenous vein 75.0%) in patients of simple follow up and 61.6%(internal thoracic artery 81.1%, saphenous vein 55.3%) in patients with ischemia. Progression of native coronary arterial disease proximal to the grafting site was found in 50 patients(68.5%). Among 201 coronary arterial branches that had not been completely occluded preoperatively, ninty five branches(47.3%) revealed progression of diameter stenosis by more than 20% on the follow up study. Among them, 64 branches(31.8%) progressed to total occlusion. The incidence of disease progression was highter in the coronary arteries with patent grafts(57.5%) than in those with occluded grafts(36.3%)(p<0.05), Comparing internal thoracic artery graft with saphenous vein graft, internal thoracic artery was superior to saphenous vein, not only in terms of patency(83.3% vs 56.6%), but also in terms of result of later percutaneous intervention success rate(100% vs 62%, p<0.05). Conclusion: Due to the considerable incidence of progression of native coronary artery stenosis in the early postoperative periods, bypass grafting of a vessel with borderline stenosis, especially with vein graft, must be done prudently. And it was confirmed again that revascularization of left anterior descending artery is most important and that internal thoracic artery was superior to saphenous vein.

키워드

참고문헌

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