Hyperbilirubinaemia after cardiac surgery: the point of no return

Mina Farag, Gabor Veres, Gabor Szabó, Arjang Ruhparwar, Matthias Karck, Rawa Arif

Research output: Article

Abstract

Aims: The occurrence of hyperbilirubinaemia after heart surgery using cardiopulmonary bypass or post-operative heart failure is fairly common. We investigated the incidence, predictive value, and post-operative outcome of hyperbilirubinaemia after cardiac surgery in an effort to identify potential risk factors and significance on clinical outcome. Methods and results: Between 2006 and 2016, 1272 (10.1%) out of 12 556 patients developed hyperbilirubinaemia, defined as bilirubin concentration >3 mg/dL, during post-operative course at our institution. All patients who were operated using cardiopulmonary bypass were included. Hepatic dysfunction was diagnosed preoperatively in 200 patients (15.7%), whereas mean model of end-stage liver disease score was 11.22 ± 4.99. Early mortality was 17.4% with age [hazard ratio (HR) 1.019, 95% confidence interval (CI) 1.008–1.029; P = 0.001], diabetes (HR 1.115, CI 1.020–1.220; P = 0.017), and emergent procedures (HR 1.315, CI 1.012–1.710) as multivariate predictors. Post-operative predictors were low-output syndrome (HR 3.193, 95% CI 2.495–4.086; P < 0.001), blood transfusion (HR 1.0, CI 1.0–1.0; P < 0.001), and time to peak bilirubin (HR 1.1, CI 1.0–1.1; P < 0.001). We found an increased correlation with mortality at 3.5 post-operative day as well as an optimal cut-off value for bilirubin of 5.35 mg/dL. A maximum bilirubin of 25.5 mg/dL was associated with 99% mortality. Survival analysis showed significantly decreased survival for patients who developed late, rather than early, hyperbilirubinaemia. Conclusions: Post-operative hyperbilirubinaemia is a prevalent threat after cardiopulmonary bypass, associated with high early mortality. The timing and amount of peak bilirubin concentration are linked to the underlying pathology and are predictors of post-operative outcome. Patients with late development of steep hyperbilirubinaemia warrant meticulous post-operative care optimizing cardiac and end organ functions before reaching the point of no return.

Original languageEnglish
Pages (from-to)694-700
Number of pages7
JournalESC Heart Failure
Volume6
Issue number4
DOIs
Publication statusPublished - aug. 1 2019

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ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Farag, M., Veres, G., Szabó, G., Ruhparwar, A., Karck, M., & Arif, R. (2019). Hyperbilirubinaemia after cardiac surgery: the point of no return. ESC Heart Failure, 6(4), 694-700. https://doi.org/10.1002/ehf2.12447