The Association between Serum Lactate Level and Post CABG Complications in Cardiac Patients

Document Type : Original Article(s)

Authors

1 Assistant Professor, Department of Cardiosurgery, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

2 Cardiologist, Delasa Research Center, Isfahan, Iran.

3 Researcher, Isfahan Cardiovascular Research Center, Isfahan Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.

4 Medical Student, Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

5 Anesthesiologist, Isfahan University of Medical Sciences, Isfahan, Iran.

6 Nurse, Delasa Research Center, Isfahan, Iran.

7 General Practitioner, Isfahan Cardiovascular Research Center, Isfahan cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.

Abstract

Background: The aim of this study was to evaluate the relationship between postoperative serum lactate levels and outcome in patients undergoing coronary artery bypass graft surgery (CABG) and verify the clinical impact of hyperlactatemia (HL) during CABG in terms of postoperative morbidity and mortality rate.Methods: In this prospective study, 92 patients underwent open heart surgery. Demographic data, lactate levels, PH, 48 hours serum creatinin after surgery (mg per cent), left ventricular ejection fraction, Inotropic Drugs and the duration of  use and the duration of  intensive care unit (ICU) admission t and deaths were collected.Finding: Mortality rate was 3.3 percent, the average duration of hospitalization was 8.8 days and the duration of ICU admission was 47.27 hours. In 82.6% of the patients increased lactic acid was observed; while 17.4% of patients had a low lactate serum concentration during ICU admission.Conclusion: The findings of this study showed an association between lactate serum levels and the duration  of  ICU admission and duration of hospitalization, so hyperlactatemia could be a prognostic factor and could predict the mortality and the severity of complications in the patients undergone CABG.      

Keywords


  1. Alexiou K, Kappert U, Staroske A, Joskowiak D, Wilbring M, Matschke K, et al. Coronary surgery for acute coronary syndrome: which determi-nants of outcome remain? Clin Res Cardiol 2008; 97(9): 601-8.
  2. Murphy GS, Hessel EA, Groom RC. Optimal perfusion during cardiopulmonary bypass: an evidence-based approach. Anesth Analg 2009; 108(5): 1394-417.
  3. Rashkin MC, Bosken C, Baughman RP. Oxygen delivery in critically ill patients. Relationship to blood lactate and survival. Chest 1985; 87(5): 580-4.
  4. Takala J, Uusaro A, Parviainen I, Ruokonen E. Lactate metabolism and regional lactate ex-change after cardiac surgery. New Horiz 1996; 4(4): 483-92.
  5. Maillet JM, Le BP, Cantoni M, Nataf P, Ruffenach A, Lessana A, et al. Frequency, risk factors, and outcome of hyperlactatemia after cardiac surgery. Chest 2003; 123(5): 1361-6.
  6. Weil MH, Afifi AA. Experimental and clinical studies on lactate and pyruvate as indicators of the severity of acute circulatory failure (shock). Circulation 1970; 41(6): 989-1001.
  7. Demers P, Elkouri S, Martineau R, Couturier A, Cartier R. Outcome with high blood lactate levels during cardiopulmonary bypass in adult cardiac operation. Ann Thorac Surg 2000; 70(6): 2082-6.
  8. Landow L. Splanchnic lactate production in car-diac surgery patients. Crit Care Med 1993; 21(2 Suppl): S84-S91.
  9. Boldt J, Piper S, Murray P, Lehmann A. Case 2-1999. Severe lactic acidosis after cardiac sur-gery: sign of perfusion deficits? J Cardiothorac Vasc Anesth 1999; 13(2): 220-4.
  10. Totaro RJ, Raper RF. Epinephrine-induced lactic acidosis following cardiopulmonary bypass. Crit Care Med 1997; 25(10): 1693-9.
  11. Raper RF, Cameron G, Walker D, Bowey CJ. Type B lactic acidosis following cardiopulmo-nary bypass. Crit Care Med 1997; 25(1): 46-51.
  12. Habib RH, Zacharias A, Schwann TA, Riordan CJ, Durham SJ, Shah A. Adverse effects of low hematocrit during cardiopulmonary bypass in the adult: should current practice be changed? J Thorac Cardiovasc Surg 2003; 125(6): 1438-50.
  13. Swaminathan M, Phillips-Bute BG, Conlon PJ, Smith PK, Newman MF, Stafford-Smith M. The association of lowest hematocrit during cardio-pulmonary bypass with acute renal injury after coronary artery bypass surgery. Ann Thorac Surg 2003; 76(3): 784-91.
  14. Gunnerson KJ, Saul M, He S, Kellum JA. Lactate versus non-lactate metabolic acidosis: a retro-spective outcome evaluation of critically ill pa-tients. Crit Care 2006; 10(1): R22.
  15. Ranucci M, Isgro G, Romitti F, Mele S, Biagioli B, Giomarelli P. Anaerobic metabolism during cardiopulmonary bypass: predictive value of carbon dioxide derived parameters. Ann Thorac Surg 2006; 81(6): 2189-95.