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Ethnic differences in coagulation factor abnormalities after the Fontan procedure.

Y-F Cheung1, G W Chay2, E S K Ma3

  • 1Division of Paediatric Cardiology, Department of Paediatrics and Adolescent Medicine, Grantham Hospital,The University of Hong Kong, 125, Wong Chuk Hang Road, Aberdeen, Hong Kong, People's Republic of China. xfcheung@hkucc.hku.hk.

Pediatric Cardiology
|October 20, 2005
PubMed
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This summary is machine-generated.

Chinese patients post-Fontan procedure show a less prothrombotic coagulation profile than Caucasians, with lower deficiencies in key factors, suggesting a bleeding tendency.

Area of Science:

  • Cardiology
  • Hematology
  • Pediatric Surgery

Background:

  • The Fontan procedure is a palliative surgery for complex congenital heart disease.
  • Coagulation abnormalities are common after the Fontan procedure, with a prothrombotic tendency often reported in Caucasian populations.
  • Ethnic variations in coagulation profiles post-Fontan procedure are not well-established.

Purpose of the Study:

  • To investigate the coagulation profile in ethnic Chinese patients following the Fontan procedure.
  • To compare the prevalence of anticoagulant and procoagulant deficiencies in Chinese patients with reported data from Caucasian patients.
  • To determine if Chinese patients exhibit a less prothrombotic coagulation profile compared to Caucasian counterparts.

Main Methods:

  • Assessed liver function and coagulation factors in 21 ethnic Chinese patients post-Fontan procedure.

Related Experiment Videos

  • Compared patient data with 21 age-matched Chinese controls with minor congenital heart disease.
  • Compared coagulation factor deficiency prevalence with previously reported Caucasian data.

    • Main Results:

    • Chinese patients post-Fontan procedure had significantly lower levels of protein C, factors II, V, VII, IX, and X compared to controls.
    • Prevalence of protein C deficiency was 9.5%, factor V deficiency 66.7%, factor VII deficiency 9.5%, and factor X deficiency 57.1%.
    • Compared to Caucasians, Chinese patients showed significantly lower prevalence of protein C, total protein S, antithrombin III, factor II, and factor VII deficiencies, but higher factor X deficiency.

    Conclusions:

    • This study provides the first evidence of ethnic differences in coagulation factor abnormalities after the Fontan procedure.
    • The coagulation profile in Chinese patients post-Fontan procedure appears less prothrombotic than in Caucasian patients.
    • The observed imbalance in coagulation pathways in Chinese patients suggests a greater tendency towards bleeding rather than thrombosis.