Absence of VIII AHF response to adrenalin in hemophilia A

M. Elaine Eyster, Margaret Dranchak, Judy Haverstick, John S. Rogers

    Research output: Contribution to journalArticlepeer-review

    2 Scopus citations

    Abstract

    Proportionate twofold or greater increases in both Factor VIII procoagulant activity (VIII AHF) and Factor VIII‐like antigen (VIII AGN) have been observed to follow the administration of adrenalin in normal individuals. Levels of factor VIII procoagulant or clot‐promoting activity (VIII AHF) and VIII AGN were measured immediately before and one hour after the subcutaneous injection of adrenalin (0.35 ml) in ten adults with hemophilia A documented by low VIII AHF levels (ranging from 0.01‐0.25 units/ml, normal VIII AGN levels, and normal VIII VWF levels as measured by the washed‐platelet ristocetin assay). Eighteen normal adults served as controls. Results were analyzed by the paired t test. It was shown that VIII AGN increased significantly, while VIII AHF did not change, in hemophiliacs after adrenalin stimulation, regardless of the base line level. This fixed rate of VIII AHF production, release, or activation may help to explain the constancy of VIII AHF levels in individual hemophiliacs and their affected family members.

    Original languageEnglish (US)
    Pages (from-to)193-198
    Number of pages6
    JournalAmerican Journal of Hematology
    Volume3
    Issue number2
    DOIs
    StatePublished - 1977

    All Science Journal Classification (ASJC) codes

    • Hematology

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