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Risk of adverse events after coronary artery bypass graft and subsequent noncardiac surgery

    ,
    Shawn D Carpenter

    The Department of Anesthesiology, Mayo Clinic, Rochester, MN, USA

    ,
    Venkata R Thota

    Department of Cardiovascular Diseases, Mayo Clinic College of Medicine, 13400 E Shea Blvd, Scottsdale, AZ 85259, USA

    ,
    Steven Cha

    Department of Biostatistics, Mayo Clinic, Rochester, MN, USA

    ,
    Panupong Jiamsripong

    Department of Cardiovascular Diseases, Mayo Clinic College of Medicine, 13400 E Shea Blvd, Scottsdale, AZ 85259, USA

    ,
    Mohsen S Alharthi

    Department of Cardiovascular Diseases, Mayo Clinic College of Medicine, 13400 E Shea Blvd, Scottsdale, AZ 85259, USA

    ,
    Charanjit S Rihal

    Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA

    &
    Martin D Abel

    Division of Cardiovascular & Thoracic Anesthesia, Mayo Clinic, Rochester, MN, USA

    Published Online:https://doi.org/10.2217/fca.10.116

    Aims: Coronary artery bypass grafts (CABGs) are increasingly performed in elderly patients. Risk factors and outcomes are poorly described for those undergoing noncardiac surgery within 1 year after CABG. Our objectives were to assess the risk and predictors of major adverse events associated with noncardiac surgery within 1 year after CABG. Methods: In a retrospective review of medical records at Mayo Clinic (Rochester, MN, USA), over a period of 5 years, we identified patients who underwent noncardiac procedures within 1 year post-CABG. All events that occurred within 30 days after noncardiac surgery and deaths within 1 year after noncardiac surgery were considered to be related to CABG. Results: We identified 211 patients; of these, 21 patients had 24 adverse events. Within 1 year, 11 died, and within the first 30 days, three myocardial infarctions, six acute congestive heart failure episodes, three cerebrovascular accidents and one deep vein thrombosis episode had occurred. Predictors of an adverse event included emergency operation (odds ratio: 6.8), ejection fraction less than 45% (p < 0.001) and elevated right ventricular systolic pressure by 40 mmHg or more (p = 0.03). After the noncardiac procedure, patients requiring dialysis (p = 0.02), ventilatory support (p = 0.03) and longer hospital stay (p = 0.03) had greater rates of adverse outcomes. Conclusion: Post-CABG, preoperative ejection fraction less than 45%, right ventricular systolic pressure of 40 mmHg or more, as well as emergent noncardiac surgery, were predictors of adverse outcomes after the noncardiac procedure. Longer postoperative hospital stay, dialysis, as well as ventilatory support, were predictors of adverse outcomes after CABG.

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