2006 Heart-Brain summit proceedings

Open heart surgery and
cognitive decline

Mark F. Newman, MD

Department of Anesthesiology
Duke Heart Center
Duke University Medical Center
Durham, NC

ARTICLE INTRODUCTION

Mild cognitive decline occurs normally as people age, and specific at-risk populations, such as those with cerebral vascular disease or coronary disease, decline faster. Patients who undergo coronary artery bypass graft surgery(CABG) are known to have an increased risk of stroke, other serious adverse cerebral events, and cognitive decline.

This paper reviews the incidence and the short-term and long-term sequelae of neurologic injury following cardiac surgery. Possible causes of neurologic injury are discussed, as well as strategies for prevention. The potential contributions of genomics in identifying patients at high risk for neurologic injury from surgery are also discussed.

CITATIONS

  1. Roach GW, Kanchuger M, Mangano CM, et al.
    Adverse cerebral outcomes after coronary bypass surgery. Multicenter Study of Perioperative Ischemia Research Group and the Ischemia Research and Education Foundation Investigators. N Engl J Med 1996; 335:1857–1863.
    http://www.ncbi.nlm.nih.gov/pubmed/8948560

  2. Newman MF, Kirchner JL, Phillips-Bute B, et al.
    Longitudinal assessment of neurocognitive function after coronary-artery bypass surgery. N Engl J Med 2001; 344:395–402. Erratum in: N Engl J Med 2001; 344:1876.
    http://www.ncbi.nlm.nih.gov/pubmed/11172175
  3. Newman MF, Grocott HP, Mathew JP, et al.
    Report of the substudy assessing the impact of neurocognitive function on quality of life 5 years after cardiac surgery. Stroke 2001; 32:2874–2881.
    http://www.ncbi.nlm.nih.gov/pubmed/11739990
  4. Lyketsos CG, Toone L, Tschanz J, et al.
    A population-based study of the association between coronary artery bypass graft surgery (CABG) and cognitive decline: the Cache County study. Int J Geriatr Psychiatry 2006; 21:509–518.
    http://www.ncbi.nlm.nih.gov/pubmed/16645936
  5. Dietrich WD, Busto R, Globus MY, Ginsberg MD.
    Brain damage and temperature: cellular and molecular mechanisms. Adv Neurol 1996; 71:177–194.
    http://www.ncbi.nlm.nih.gov/pubmed/8790799
  6. Grigore AM, Grocott HP, Mathew JP, et al.
    The rewarming rate and increased peak temperature alter neurocognitive outcome after cardiac surgery. Anesth Analg 2002; 94:4–10.
    http://www.ncbi.nlm.nih.gov/pubmed/11772792
  7. Davila-Roman VG, Barzilai B, Wareing TH, et al.
    Intraoperative ultrasonographic evaluation of the ascending aorta in 100 consecutive patients undergoing cardiac surgery. Circulation 1991; 84(Suppl 3):47–53.
    http://www.ncbi.nlm.nih.gov/pubmed/1934441
  8. St-Amand MA, Murkin JM, Menkis AH, Downey DB, Nantau W, Adams S.
    Aortic atherosclerotic plaque identified by epiaortic scanning predicts cerebral embolic load in cardiac surgery. Can J Anaesth 1997; 44(Suppl):A7.
  9. Gold JP, Charlson ME, Williams-Russo P, et al.
    Improvement of outcomes after coronary artery bypass. A randomized trial comparing intraoperative high versus low mean arterial pressure. J Thorac Cardiovasc Surg 1995; 110:1302–1314.
    http://www.ncbi.nlm.nih.gov/pubmed/7475182
  10. Hartman GS, Yao FS, Bruefach M III, et al.
    Severity of aortic atheromatous disease diagnosed by transesophageal echocardiography predicts stroke and other outcomes associated with coronary artery surgery: a prospective study. Anesth Analg 1996; 83:701–708.
    http://www.ncbi.nlm.nih.gov/pubmed/8831306
  11. Grocott HP, White WD, Morris RW, et al.
    Genetic polymorphisms and the risk of stroke after cardiac surgery. Stroke 2005; 36:1854–1858.
    http://www.ncbi.nlm.nih.gov/pubmed/16051899