A case-cohort study of postoperative myocardial infarction: Impact of anemia and cardioprotective medications

被引:16
作者
Henke, Peter K. [1 ]
Zamora-Berridi, Grettel [1 ]
Englesbe, Michael J. [1 ]
Cai, Shijie [1 ]
Brooks, Linda [1 ]
McKeown, Ellen [1 ]
Phillips, Laurel [1 ]
Lau, Wei [2 ]
Campbell, Darrell C. [1 ]
机构
[1] Univ Michigan, Dept Surg, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Anesthesia, Ann Arbor, MI 48109 USA
关键词
RED-BLOOD-CELL; MAJOR NONCARDIAC SURGERY; CARDIAC ADVERSE EVENTS; BETA-BLOCKER THERAPY; VASCULAR-SURGERY; 30-DAY MORTALITY; CLINICAL CHARACTERISTICS; PREOPERATIVE ANEMIA; SURGICAL-PATIENTS; ARTERY-DISEASE;
D O I
10.1016/j.surg.2014.06.055
中图分类号
R61 [外科手术学];
学科分类号
摘要
Objective. Postoperative myocardial infarction (poMI) is a serious and costly complication. Multiple risk factors for poMI are known, but the effect of anemia and cardioprotective medications have not been defined in real-world surgical practice. Methods. Patients undergoing inpatient elective surgery were assessed at 17 hospitals from 2008 to 2011 for the occurrence of poMI (American Heart Association definition). Non-MI control patients were chosen randomly on the basis of case type. Descriptive, univariable, and multivariable statistical analysis were performed for primary outcomes of poMI and death at 30 days. Results. Compared with controls (N = 304), patients with poMI (N.= 222) were older (72 +/- 11 vs 60 +/- 17 years, P < .0001), had a lesser preoperative hematocrit (37 +/- vs 39 +/- 5, P < .0001), more often were smokers, had a preoperative T-wave abnormality (21% vs 9%, P < .0001), and had a preoperative stress test with a fixed deficit (26% vs 3 %; P < .001). Preoperative factors associated with poMI included peripheral vascular disease (odds ratio 2.6; 95% confidence interval 1.3-5.3), tobacco use (1.7; 1.01-2.9), history of percutaneous coronary angioplasty (2.8; 1.6-5.0), and age (1.05; 1.03-1.07), whereas hematocrit >35 (0.51; 0.32-0.82) and preoperative acetylsalicylic acid, ie, aspirin (0.59; 0.4-0.97) were protective. Preoperative beta-blockade, statin, and use of angiotensin-converting enzyme inhibitors were not associated with lesser rates of poMI. Non-MI complication rates were 23-fold greater in the poMI group compared with the control group (P < .0001). Mortality with poMI within 30 days was 11% compared with 0.3% in non-MI control patients (P < .0001). In patients with poMI, factors independently associated with death included use of epidurals (3.5; 1.07-11.4) and bleeding (4.2; 1.1-16), whereas preoperative use of aspirin (0.29; 0.1-0.88), and postoperative beta-blockade (0.18; 0.05-0.63) were protective. Cardiac catheterization, percutaneous coronary intervention, or coronary artery bypass grafting after poMI was performed in 34% of those alive and 20% of those who died (P = .16). Conclusion. In the current era, poMI patients have a markedly increased risk of death. This risk is decreased with preoperative use of acetylsalicylic acid and post MI beta-blockade. Further study is warranted to explore the role of anemia and cardiac interventions after poMI.
引用
收藏
页码:1018 / 1029
页数:12
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