Rahimtoola S H, Grunkemeier G L, Teply J F, Lambert L E, Thomas D R, Suen Y F, Starr A
JAMA. 1981;246(17):1912-6.
Coronary bypass surgery was performed on 439 patients between the years 1969 and 1973 (group A) and on 1,760 patients between the years 1974 and 1979 (group B). The operative mortality for group A was 3.9%; for group B, 1.3%; four-year survival for group A patients was 88.9% +/- 1.5% (mean +/- SE); for group B patients, 92.5% +/- 0.9%. The difference between the relative four-year survival rates (based on age- and sex-matched Oregon population) between group B and A was 6.2%; the lower operative mortality would account for only 2.6%. We conclude that the results of coronary bypass surgery have improved because of (1) a lower operative mortality, and (2) other factors that cannot be precisely defined at the present time but probably are the long-term result of better and more complete operative and perioperative techniques.
1969年至1973年间，对439例患者实施了冠状动脉搭桥手术（A组）；1974年至1979年间，对1760例患者实施了该手术（B组）。A组的手术死亡率为3.9%；B组为1.3%。A组患者的四年生存率为88.9%±1.5%（均值±标准误）；B组患者为92.5%±0.9%。B组与A组相对四年生存率（基于年龄和性别匹配的俄勒冈州人群）的差异为6.2%；较低的手术死亡率仅占2.6%。我们得出结论，冠状动脉搭桥手术的结果有所改善，原因如下：（1）手术死亡率降低；（2）其他目前无法精确界定的因素，但可能是更好、更完善的手术及围手术期技术的长期结果。
