Heparin-calibrated anti-factor Xa activity as a surrogate marker for direct oral anticoagulant levels in acute stroke care: a large observational single-center study
Defined anti-Xa cut-offs are highly specific and sensitive and enable rapid and standardized assessment of anticoagulant activity in this cohort and Heparin-calibrated anti-Xa activity is a reliable surrogate marker for clinically relevant DOAC levels.