Patients receiving chronic anticoagulant or antiplatelet therapy for existing conditions should remain on their current regimen if positive for COVID-19, unless a new clot has developed, or ICU level of care requires a switch to parenteral/SubQ therapy
i.e. evidence of DVT/PE/positive Doppler or high clinical suspicion
Modified International Medical Prevention Registry on Venous Thromboembolism (IMPROVE) VTE risk score ≥4; or Modified IMPROVE VTE risk score ≥2 and D-dimer level >2 times the upper limit of normal
Guidelines