COMPARATIVE STUDY
JOURNAL ARTICLE
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Seizures after open heart surgery: comparison of ε-aminocaproic acid and tranexamic acid.

OBJECTIVE: Although the lysine analogs tranexamic acid (TXA) and aminocaproic acid (EACA) are used widely for antifibrinolytic therapy in cardiac surgery, relatively little research has been performed on their safety profiles, especially in the setting of cardiac surgery. Two antifibrinolytic protocols using either TXA or aminocaproic acid were compared according to postoperative outcome.

DESIGN: A retrospective analysis.

SETTING: A university-affiliated hospital.

PARTICIPANTS: Six hundred four patients undergoing cardiac surgery.

INTERVENTIONS: One cohort of 275 consecutive patients received TXA; a second cohort of 329 consecutive patients was treated with EACA. Except for antifibrinolytic therapy, the anesthetic and surgical teams and their protocols remained unchanged.

MEASUREMENTS AND MAIN RESULTS: Besides major outcome criteria, namely postoperative bleeding, the need for allogeneic transfusions, operative revision because of bleeding, postoperative renal dysfunction, neurologic events, heart failure, and in-hospital mortality, the authors specifically sought differences between the groups concerning seizures. The 2 cohorts were comparable over a range of perioperative factors. Postoperative seizures occurred significantly more frequently in TXA patients (7.6% v 3.3%, p = 0.019), whereas EACA patients had a higher incidence of postoperative renal dysfunction (20.0% v 30.1%, p = 0.005). There were no differences in all other measured major outcome factors.

CONCLUSION: Both lysine analogs are associated with significant side effects, which must be taken into account when performing risk-benefit analyses of their use. Their use should be restricted to patients at high risk for bleeding; routine use on low-risk patients undergoing standard surgeries should face renewed critical reappraisal.

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