To the Editor: The finding by Khamashta et al. (April 13 issue)1supports those of two recent studies,2,3 which demonstratedthat patients with antiphospholipid antibodies are in an ongoingprothrombotic state. In this condition there are high plasmavalues of prothrombin fragment F1+2, a peptide derived fromthe conversion of prothrombin to thrombin and considered a markerof thrombin generation in vivo.
Even if Khamashta et al. show that the risk of bleeding withwarfarin therapy is low, an important issue is whether all patientswith antiphospholipid-antibody syndrome and a history of thrombosisshould be treated with oral . . . [Full Text of this Article]
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