Abstract
Antithrombotic drugs are the therapeutic cornerstone for patients with antiphospholipid
syndrome (APS) and thrombosis. Choosing the specific agent (vitamin K antagonists
or antiplatelet drugs), the intensity of anticoagulation (e.g., international normalized
ratio [INR] range 2.0 to 3.0 or 3.0 to 4.0), and the duration of treatment has been
a recurrent matter of debate. A recent consensus document recommends warfarin to an
INR range of 2.0 to 3.0 for patients with a first venous thromboembolic event. Higher
anticoagulation intensity is recommended for patients presenting with arterial events.
Combined therapy with warfarin and aspirin is another possibility, but some authors
recommend standard intensity warfarin or aspirin, either as monotherapy. In general,
a more intense regimen is warranted for high-risk patients. On the basis of an increased
risk of recurrence during the first 6 months following warfarin withdrawal, long-term
anticoagulation is considered the standard treatment. Nevertheless, anticoagulation
regimes of shorter duration could be given in selected patients with venous thromboembolism
who have transient risk factors and a low-risk profile.
Keywords
antiphospholipid syndrome - anticoagulation therapy - intensity - duration