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Related Experiment Videos

Adrenal function during coronary artery bypass grafting.

Christoph Henzen1, Richard Kobza, Birgit Schwaller-Protzmann

  • 1Department of Internal Medicine, Kantonsspital, CH-6000 Luzern 16, Switzerland. Christoph.Henzen@ksl.ch

European Journal of Endocrinology
|May 30, 2003
PubMed
Summary

Occult adrenal insufficiency is common in patients undergoing coronary artery bypass grafting (CABG). Impaired adrenal function after CABG correlates with blood loss and volume balance, showing delayed cortisol response.

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Area of Science:

  • Endocrinology
  • Cardiovascular Surgery
  • Critical Care Medicine

Background:

  • Coronary artery bypass grafting (CABG) is a major surgical procedure.
  • Adrenal function is crucial for stress response and hemodynamic stability.
  • Subtle adrenal insufficiency may impact outcomes in critically ill patients.

Purpose of the Study:

  • To evaluate adrenal function using a low-dose (1 microg) ACTH test in patients undergoing CABG.
  • To correlate adrenal function with clinical outcomes such as blood loss and volume balance.

Main Methods:

  • Prospective study of 45 patients undergoing elective CABG.
  • Low-dose ACTH tests performed preoperatively and postoperatively (days -1, 0, 1, 2, and discharge).
  • Monitoring of clinical, hemodynamic, and laboratory parameters.

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Main Results:

  • 25% of patients showed impaired adrenal response preoperatively.
  • Patients with impaired response had significantly reduced cortisol concentrations postoperatively.
  • Peak cortisol concentrations were delayed in patients with blunted adrenal response.
  • Adrenal function correlated with blood loss and volume balance.

Conclusions:

  • Occult adrenal insufficiency is prevalent in asymptomatic patients undergoing CABG.
  • Adrenal function impairment is characterized by altered cortisol response magnitude and timing.
  • Maintaining adequate volume balance and managing blood loss are crucial for adrenal function.