Background
In the initial absence of specific reversal agents for factor Xa inhibitors (FXa-Is), prothrombin complex concentrate (PCC) as a hemostatic agent has been recommended by guidelines. Since 2017, idarucizumab has been registered for dabigatran reversal. Still, data on the clinical outcome of direct oral anticoagulant (DOAC)-related emergencies (major bleeding or urgent interventions) is scarce. In addition, it is unknown to what extent PCC restores thrombin generation in FXa-I-related emergencies. Our
Conclusions
Effective hemostasis was achieved in the majority of patients presenting with DOAC-related emergencies;, thromboembolic complications were rare, and mortality was quite high.
Methods
In this prospective cohort study in 5 Dutch hospitals, patients presenting with DOAC-related emergencies were eligible. The primary outcome was effective hemostasis according to the ISTH definition. Safety outcomes were 30-day mortality and thromboembolic rate. In patients treated with PCC, additional blood samples were taken to assess the effect on thrombin generation.
Results
We included 101 patients with major bleeding (FXa-I, 76; dabigatran, 25) and 21 patients requiring an urgent intervention (FXa-I, 16; dabigatran, 5). Of patients with major bleeding, 67% were treated with PCC or idarucizumab. Effective hemostasis, 30-day mortality, and thromboembolism rate were 67%, 22%, and 1%, respectively. In a subset of bleeding patients on FXa-I managed with PCC, thrombin generation increased, with 96% immediately after PCC administration. In patients requiring an urgent intervention, effective hemostasis, 30-day mortality, and thromboembolic rate were 95%, 14%, and 5%. Conclusions: Effective hemostasis was achieved in the majority of patients presenting with DOAC-related emergencies;, thromboembolic complications were rare, and mortality was quite high.