Open-heart surgery in patients with liver cirrhosis: indications, risk factors, and clinical outcomes
- PMID: 17283429
- DOI: 10.1159/000099145
Open-heart surgery in patients with liver cirrhosis: indications, risk factors, and clinical outcomes
Abstract
Background: Because of recent advances in cardiopulmonary bypass (CPB) surgery, there are broadened indications to approach patients with a high operative risk. Meanwhile, there is an increasing number of patients with severe liver dysfunction subjected to open-heart surgery. This retrospective study was designed to evaluate the operative indications and clinical outcomes in patients with liver cirrhosis (LC) undergoing open-heart surgery. In addition, determinants influencing their prognosis were assessed.
Patients and methods: Between May 1996 and June 2005, 24 patients with LC underwent CPB open-heart surgery in our institution. The preoperative severity of the LC was determined according to the Child-Pugh classification. Their perioperative data were analyzed. Several perioperative factors were compared by multivariate logistic regression analysis between survivors and nonsurvivors to determine possible risk factors contributing to mortality.
Results: There were 14 females and 10 males. Their age ranged from 36 to 72 (mean 53 +/- 13) years. Seventeen cases were classified as having Child-Pugh class A LC, 6 as having Child-Pugh class B, and 1 as having Child-Pugh class C LC. All patients underwent CPB surgery. The mean operation time and the cross-clamp time were 160 +/- 53 and 90 +/- 42 min, respectively. During the first 24 h after the operation, the mean chest tube output was 1,080 +/- 320 ml. The mean duration of mechanical ventilation was 32 +/- 22 h, and the mean intensive care unit stay was 11 +/- 8 days. Sixty-six percent of the patients experienced significant morbidity. Fifty-three percent of the patients with Child-Pugh class A LC and 100% of those with Child-Pugh class B and C LC suffered postoperative complications. The overall mortality rate was 25%. The postoperative mortality rates of the patients with Child-Pugh class A, B, and C LC were 6, 67, and 100%, respectively. Preoperative serum total bilirubin and cholinesterase levels and EuroSCORE (European System for Cardiac Operative Risk Evaluation) values along with CPB time were identified as the important predictors to differentiate between survivors and nonsurvivors by multivariate logistic regression analysis.
Conclusions: The Child-Pugh class is associated with hepatic decompensation and mortality after open-heart CPB surgery in patients with LC. Such surgery can be performed safely in patients with a Child-Pugh class A LC. But cardiac interventions using CPB in patients with more advanced LC are associated with high mortality and morbidity rates. The preoperative total plasma bilirubin and cholinesterase concentrations as well as the EuroSCORE along with the CPB time are identified as statistically significant predictors of mortality after open-heart surgery in patients with LC. Our findings indicate that patients with chronic liver disease scheduled for open-heart surgery should be carefully evaluated before the operation and that the CPB duration should be as short as possible.
Copyright 2007 S. Karger AG, Basel.
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