Predictors associated with an increased prevalence of postimplantation syndrome after thoracic endovascular aortic repair for type B aortic dissection†.

OBJECTIVES

The aim of this study was to identify patients who are at high risk of developing postimplantation syndrome (PIS) after thoracic endovascular aortic repair (TEVAR) for type B aortic dissection.

METHODS

This retrospective study included 646 patients who underwent TEVAR for type B aortic dissection between January 2010 and December 2015 at the Guangdong General Hospital. PIS was defined as fever (>38°C) and leucocytosis (>12 000 μl-1) without evidence of infection. The PIS rate was calculated, and a multivariable logistic regression model was used to investigate the factors related to PIS.

RESULTS

A total of 646 patients (58.8 ± 11.0 years, 87.9% men) were included in the analysis. PIS was diagnosed in 204 (31.6%) patients. Age <60 years [odds ratio (OR) 1.828, 95% confidence interval (CI) 1.277-2.619; P < 0.001), hypertension (OR 12.125, 95% CI 4.310-34.111; P < 0.001), >1 stent graft placed (OR 1.862, 95% CI 1.109-3.124; P = 0.011), arch vessel bypass (OR 2.107, 95% CI 1.397-3.176; P = 0.001) and Ankura stent graft placement (OR 1.951, 95% CI 1.298-2.933; P = 0.001) were positively associated with PIS, whereas statin use (OR 0.659, 95% CI 0.460-0.944; P = 0.023) was negatively associated with PIS in the multivariable logistic regression analysis based on a stepwise regression model.

CONCLUSIONS

Age <60 years, comorbid hypertension, >1 stent graft placed, arch vessel bypass and Ankura stent graft placement emerged as independent predictors of PIS. Stepwise increases in the prevalence of PIS were found to depend on the number of independent predictors.