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A Carvalho and L Ellman
Thrombosis is one of the major complications of polycythemia vera.
Seventeen patients with polycythemia vera in good hematologic control were
evaluated for abnormalities of the coagulation system. Activation of the
intrinsic coagulation cascade was suggested by low levels of factor XII,
prekallikrein, and kallikrein inhibitors in 12 of 17 patients. The group
also demonstrated a significant increase in soluble fibrin complexes using
plasma gel filtration on 4% agarose. Fibrin degradation products were
normal and antithrombin III levels were slightly elevated. It appears that
patients with polycythemia vera have chronic activation of the coagulation
system, probably initiated by activation of factor XII. No correlation
between the degree of coagulation abnormalities and thromboembolic
complications was evident in this group of patients.
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| Copyright © 1976 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||