Elevated plasma factor VIII and D-dimer levels as predictors of poor outcomes of thrombosis in children

The New England Journal of Medicine
Neil A GoldenbergMountain States Regional Thrombophilia Group

Abstract

Elevated levels of plasma factor VIII and D-dimer predict recurrent venous thromboembolism in adults. We sought to determine whether an elevation of factor VIII, D-dimer, or both at diagnosis and persistence of the laboratory abnormality after three to six months of anticoagulant therapy correlate with poor outcomes of thrombosis in children. We evaluated levels of factor VIII and D-dimer and additional components of an extensive laboratory thrombophilia (i.e., hypercoagulability) panel at the time of diagnosis in 144 children with a radiologically confirmed acute thrombotic event. All patients were treated initially with heparin and then with either warfarin or low-molecular-weight heparin for at least three to six months, according to the current standard of care. Patients were examined at follow-up visits 3, 6, and 12 months after diagnosis and then annually, at which times testing was repeated in children with previously abnormal factor VIII and D-dimer test results and a uniform evaluation for the post-thrombotic syndrome was performed. Among 82 children for whom complete data were available regarding laboratory test results at diagnosis and thrombotic outcomes during follow-up, 67 percent had factor VIII levels above the ...Continue Reading

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Citations

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