Preoperative stroke and outcomes after coronary artery bypass graft surgery

Alex Bottle1, Abdul Mozid, Hilary P Grocott

  • 1School of Public Health, Imperial College London, UK.

Anesthesiology
|January 11, 2013
PubMed

Insights

Timing of coronary artery bypass grafting (CABG) after stroke did not affect mortality or length of stay. However, a longer interval slightly increased postoperative stroke risk, while combined stroke and myocardial infarction significantly raised perioperative risk.

Area of Science:

  • Cardiovascular Surgery
  • Neurology
  • Health Services Research

Background:

  • Optimal timing for coronary artery bypass grafting (CABG) after stroke is unknown.
  • Preoperative stroke is a significant risk factor for adverse outcomes in CABG patients.

Purpose of the Study:

  • To investigate preoperative predictors of adverse outcomes in CABG patients.
  • To determine the impact of the time interval between stroke and CABG on outcomes.

Main Methods:

  • Analysis of elective CABG admissions from the Hospital Episode Statistics database (April 2006-March 2010).
  • Logistic regression used to identify independent preoperative factors affecting length of stay, postoperative stroke, and mortality.
  • Results presented as adjusted odds ratios (OR).

Main Results:

  • Prior stroke increased mortality (OR 2.20), postoperative stroke (OR 1.99), and prolonged length of stay (OR 1.31).
  • Time interval between stroke and CABG did not impact mortality or length of stay.
  • A longer interval slightly increased postoperative stroke risk (OR per month 1.02).
  • Combined prior stroke and myocardial infarction significantly increased death risk (OR 5.50).
  • Liver disease (OR 20.8) and renal failure (OR 4.59) also prominently affected mortality.

Conclusions:

  • No evidence suggests that recent preoperative stroke increases the risk of postoperative stroke, death, or prolonged stay after CABG.
  • The combination of prior stroke and myocardial infarction substantially elevates perioperative risk in CABG patients.
Abstract

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