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Hyperamylasemia following cardiopulmonary bypass.

Abstract
In order to study the occurrence of postbypass hyperamylasemia, 75 patients undergoing cardiopulmonary bypass (CPB) were studied from March 1989 to January 1990. There were 49 males and 26 females. Among them, 27 had congenital heart disease, 30 had valvular disease, and 18 had coronary artery disease. There were 27 patients with at least one elevated serum amylase sample after operation. Thus, the overall incidence of hyperamylasemia was 36%. As compared with the preoperative data (1.3%), there was a statistically significant difference in the occurrence of hyperamylasemia (p less than 0.05). Three patients had overt clinical pancreatitis postoperatively. There was no positive correlation between the serum amylase level and the occurrence of pancreatitis (p greater than 0.05). Forty-two cases had a significant elevation of the amylase creatinine clearance ratio (ACCR) after CPB. However, there was no significant difference between the groups with pulsatile and nonpulsatile CPB (p greater than 0.05). Three patients (4%) died in our series. The causes of death were heart failure in two and fulminant pancreatitis associated with low cardiac output in one. Although our experience in dealing with pancreatitis improved survival, mortality was still high (33.3%) in our series. Nevertheless, there was no apparent correlation between mortality and postbypass hyperamylasemia (p greater than 0.05). Logistic regression analysis was used to analyze the risk factors of the occurrence of hyperamylasemia, and the analysis revealed that patients with coronary artery disease were susceptible to postbypass hyperamylasemia. Our studies indicate that the use of total serum amylase or ACCR to monitor for the occurrence of pancreatitis in postbypass patients is inadequate.(ABSTRACT TRUNCATED AT 250 WORDS)
AuthorsH Chang, Y T Chung, G J Wu, F Y Hwang, K T Chen, W L Peng, C R Hung
JournalJournal of the Formosan Medical Association = Taiwan yi zhi (J Formos Med Assoc) Vol. 91 Issue 1 Pg. 34-40 (Jan 1992) ISSN: 0929-6646 [Print] China (Republic : 1949- )
PMID1377742 (Publication Type: Journal Article)
Chemical References
  • Creatinine
  • Amylases
Topics
  • Amylases (blood)
  • Cardiopulmonary Bypass (adverse effects)
  • Creatinine (pharmacokinetics)
  • Female
  • Humans
  • Male
  • Metabolic Clearance Rate
  • Pancreatitis (etiology)

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