Viscoelastic testing is improved following antivenom treatment in rattlesnake-envenomated equids.

Objective: To characterize coagulopathies before and after antivenom administration in rattlesnake-envenomated equids.

Methods: Client-owned envenomated equids treated with antivenom at Colorado State University (2023 to 2024). Rattlesnake bite severity score (RBSS), platelet count, prothrombin time, activated thromboplastin time, D-dimers, antithrombin, and viscoelastic testing variables were assessed before and after antivenom administration.