If long-term anticoagulation is required, heparin is often used only to commence anticoagulation therapy until an oral anticoagulant e.g. warfarin takes effect.
Se cómpre un efecto anticoagulante de longa duración, a heparina xeralmente só se usa ao comezo da terapia, ata que o anticoagulante oral warfarina empece a facer efecto.