[Evaluation of predisposing factors for mediastinal bleeding in myocardial revascularization surgery. Role of acetylsalicylic acid, other platelet adhesion inhibitors, and anticoagulants].

Objective: To determine the main factors for perioperative mediastinal bleeding during coronary artery by-pass grafting and to establish the role of acetylsalicylic acid, other inhibitors of platelet adhesion, and anticoagulants in its occurrence.

Methods: A multivariate analysis was performed to the data obtained from 251 patients subjected to coronary artery by-pass grafting in the year 2002.

Results: There were no significant differences for the occurrence of perioperative bleeding induced by the preoperative administration of acetylsalicylic acid.