Objective: The purpose of this investigation was to study the incidence and consequences of anticoagulant therapy in the surgical management of acute aortic dissections.
Study Design: Retrospective study.
Patients And Methods: We reviewed all acute type A aortic dissections that were surgically managed in our institution from 1 January 1990 to 31 December 2000. Survival outcome and characteristics potentially associated with survival were abstracted from patient records. We screened preoperative electrocardiograms (ECG) and anticoagulant therapy.
Results: ST segment elevation incidence was 14% and preoperative anticoagulant therapy occurred in 63 (20%) cases as follow: aspirin 12%, aspirin + heparin 6%, thrombolysis 1%. Overall mortality was 22%. Time between pain and surgery was not statistically different between anticoagulant therapy and standard group. Administration of antithrombotic agents before admission in -hospital increased significantly mortality (Odds ratio (OR) = 2.02; IC [1.1-3.71]; p = 0.023). Other risk factors for death were preoperative circulatory failure (OR = 8.28 [4.23-16.24], p < 0.0001), preoperative cardiac arrest (OR = 21.92 [7.16-67.14], p < 0.0001), preoperative circulatory arrest (OR = 2.79 [1.60-4.88], p = 0.0003), preoperative cerebral perfusion (OR = 2.45 [1.18-5.05], p = 0.016), postoperative circulatory failure (OR = 3.37 [1.85-6.17], p < 0.0001), postoperative cardiac arrest (OR = 9.92 [3.49-28.21], p < 0.0001), postoperative serum creatinine >150 micromol/l (OR = 4.55 [2.43-8.50], p < 0.0001), postoperative dialysis (OR = 5.63 [2.44-13.20], p < 0.0001), more than 7 days of post-operative ventilation (OR = 23.44 [12.0-45.7], p < 0.0001).
Discussion: In our experience, 20% of acute type A aortic dissections had received a preoperative anticoagulant therapy. This event is an independent risk factor of in-hospital death and is more frequent in case of ischaemic ECG abnormalities.
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