Björk V O, Ivert T, Landou C
Scand J Thorac Cardiovasc Surg. 1981;15(1):23-30. doi: 10.3109/14017438109101021.
Coronary angiography was performed two weeks after coronary bypass surgery on 112/121 consecutive operative survivors (93%), on 97/119 one-year survivors (82%) and on 79/108 five-year survivors (73%). Occlusions of the grafts were uncommon after the first year. The cumulative five-year patency, calculated with the actuarial method, was 89% for internal mammary artery (IMA) grafts and 77% for aortocoronary saphenous vein (SV) grafts. Almost 70% of the SV grafts exhibited a 15-50% reduced diameter after one year and 10% showed progressive narrowing at five years. Diffuse luminal narrowing did not predict graft failure. The incidence of localized narrowings present at two weeks after surgery was, however, significantly higher among SV grafts, which occluded within one year, than among those patent after five years. In 5% of the IMA grafts the diameter was reduced 15-80% after five years. This was related either to obstruction at the anastomotic site or to low-grade proximal coronary stenosis. No less than 12% of the IMA grafts increased 20-50% in diameter as an adaptation to good distal runoff.
在121例连续手术存活者中的112例（93%）、119例一年存活者中的97例（82%）以及108例五年存活者中的79例（73%）于冠状动脉搭桥手术后两周进行了冠状动脉造影。术后第一年移植血管闭塞并不常见。采用精算方法计算，乳内动脉（IMA）移植血管的五年累积通畅率为89%，主动脉-冠状动脉大隐静脉（SV）移植血管的五年累积通畅率为77%。几乎70%的SV移植血管在术后一年直径缩小15% - 50%，10%在术后五年出现进行性狭窄。弥漫性管腔狭窄并不能预测移植血管失败。然而，术后两周出现局限性狭窄的发生率在一年内闭塞的SV移植血管中显著高于五年后仍通畅的移植血管。5%的IMA移植血管在术后五年直径缩小15% - 80%。这与吻合口处阻塞或近端冠状动脉轻度狭窄有关。不少于12%的IMA移植血管直径增加20% - 50%，作为对良好远端血流的适应性变化。
