mrcem2-2208

You evaluate a 45-year-old male patient with a swollen and red right calf. His D-dimer levels are elevated, and you schedule an ultrasound scan which confirms the presence of a deep vein thrombosis (DVT) in his right calf. He has a history of a previous DVT and his INR today is 2.5.
What is the MOST suitable course of action for management in this case?