Background: The study sought to evaluate if a bovine aortic arch (BAA) influences the location of the entry site in acute aortic dissection type A (AADA) and to identify the impact of BAA on postoperative outcome, especially stroke.
Methods: A total of 315 patients underwent surgery due to AADA DeBakey type I (72.1% men, mean age 59.5 ± 13.4 years) between 2002 and 2015. Imaging studies and operative reports were screened for presence of BAA and location of the entry site. Patients were divided into 2 groups based on presence (BAA+) and absence (BAA-) of BAA (BAA+ n = 49, BAA- n = 264). Dissection patterns, surgical treatment, risk factors for postoperative complications, and long-term outcome were analyzed.
Results: Prevalence of BAA in patients with AADA was 15.6%. Location of the entry site was more commonly in the aortic arch in patients with BAA (BAA+ 46.8% versus BAA- 14.3%; p < 0.001). Multivariable analysis identified BAA (odds ratio [OR], 5.9; 95% confidence interval [CI], 2.89 to 12.04; p < 0.001) and preoperative competent aortic valve (OR, 2.26; 95% CI, 1.19 to 4.31; p = 0.013) as independent predictors for an arch tear. Thirty-nine patients (12.4%) suffered from stroke. Patients with BAA had higher stroke rates (BAA+ 24.5% versus BAA- 10.2%; p = 0.009). BAA emerged as one risk factor for stroke in the setting of AADA (OR, 2.69; 95% CI, 1.2 to 6.0; p = 0.016). Long-term survival was comparable for patients with BAA and patients without congenital arch anomalies.
Conclusions: BAA is an independent predictor for the distinctive location of the entry site in the aortic arch and risk factor for stroke.
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| http://dx.doi.org/10.1016/j.athoracsur.2017.05.026 | DOI Listing |
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