Postoperatively increased bioactive adrenomedullin is related to adverse outcome after complex aortic surgery.

Abstract

Background: Open and endovascular thoracoabdominal aortic aneurysm repair is related to major complications and increased mortality rates. Up to now, specific biomarkers for adverse outcome are scarce, although routine usage of such biomarkers could enable an earlier and more appropriate treatment of complications during the postoperative course after complex aortic aneurysm repair. Patients and methods: In a prospective single-center study including 33 patients (48.5% women, mean age 63.0±16.2years) undergoing elective complex open and endovascular aortic aneurysm repair, bioactive adrenomedullin (bio-ADM) was measured for 72h perioperatively and an association with clinical endpoints, namely cardiogenic shock, death and the combined endpoint of the two aforementioned parameters was assessed. Furthermore, the association between bio-ADM and baseline characteristics and perioperative details including sepsis biomarkers score were assessed. Results: 51.5% (n=17) of patients developed postoperative acute kidney injury, 21.2% (n=7) pneumonia and 18.2% (n=6) sepsis. Cardiogenic shock was observed in 12.1% (n=4) patients. The in-hospital mortality rate was 18.2% (n=6), and 24.2% (n=8) of patients developed cardiogenic shock and/or died in hospital. A significant correlation of bio-ADM concentrations from all available time points was observed with leukocytes (r = 0.37, P < 0.0001), C-reactive protein (r = 0.56, P < 0.001) and serum creatinine levels (r = 0.52, P < 0.001). Increased bio-ADM at 12h, 24h, 48h and 72h after admission to ICU was associated with both, in-hospital death and cardiogenic shock, with an area under the curve for the combined endpoint of 0.598, 0.720, 0.880 and 0.967. Bio-ADM concentrations at 48h and 72h after admission to ICU were predictive for in-hospital death and cardiogenic shock (both P<0.01). Conclusions: Bio-ADM may serve as postoperative biomarker for cardiogenic shock and death after complex open and endovascular aortic aneurysm repair, potentially enabling an earlier and by that more adequate treatment of adverse outcome after major surgery.