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Published on: June 11, 2012

Hyperglycemia predicts mortality after CABG: postoperative hyperglycemia predicts dramatic increases in mortality

Kent W Jones1, A Steven Cain, John H Mitchell

  • 1LDS Hospital and Intermountain Healthcare, Salt Lake City, UT, USA.

Journal of Diabetes and Its Complications
|April 17, 2008
PubMed

Insights

High blood sugar after coronary artery bypass graft (CABG) surgery increases complication risks, including mortality, even without a diabetes mellitus diagnosis. Early postoperative hyperglycemia poses a significant risk, warranting further investigation into glycemic control strategies.

Area of Science:

  • Cardiovascular Surgery
  • Endocrinology
  • Critical Care Medicine

Background:

  • Coronary artery bypass graft (CABG) surgery patients with diabetes mellitus (DM) face higher morbidity and mortality risks.
  • The impact of postoperative hyperglycemia on CABG outcomes, independent of pre-existing DM, requires clarification.

Purpose of the Study:

  • To investigate the association between early postoperative hyperglycemia and adverse outcomes in CABG patients.
  • To determine if high blood glucose levels after surgery independently predict complications, irrespective of a prior DM diagnosis.

Main Methods:

  • A cohort of 2297 CABG patients was analyzed.
  • Postoperative glucose levels (measured 15 minutes after surgery) were used to stratify patients into glycemic groups.
  • Multivariable logistic regression adjusted for Society of Thoracic Surgeons risk scores was employed to assess outcome predictors.

Main Results:

  • Patients with very high postoperative glucose (>200 mg/dl) exhibited significantly higher rates of prolonged ventilation (OR=2.66), extended hospital stay (>14 days, OR=2.06), and mortality (OR=7.71) compared to the normal glucose group.
  • Distribution across glycemic groups: Low (1.9%), Normal (20.7%), High (62.0%), Very High (15.3%).

Conclusions:

  • Blood glucose levels exceeding 200 mg/dl immediately following CABG surgery are linked to increased risks of complications and mortality.
  • Early postoperative hyperglycemia is a significant independent risk factor in CABG patients, underscoring the need for prospective studies on glycemic management.
Abstract

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