Thromboprophylaxis in Patients With Fontan Circulation

Jef Van den Eynde, Mathias Possner, Fares Alahdab, Gruschen Veldtman, Bryan H. Goldstein, Rahul H. Rathod, Arvind K. Hoskoppal, Anita Saraf, Brian Feingold, Tarek Alsaied

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Background: The optimal strategy for thromboprophylaxis in patients with a Fontan circulation is unknown. Objectives: The aim of this study was to compare the efficacy and safety of aspirin, warfarin, and nonvitamin K oral anticoagulants (NOACs) in a network meta-analysis. Methods: Relevant studies published by February 2022 were included. The primary efficacy outcome was thromboembolic events; major bleeding was a secondary safety outcome. Frequentist network meta-analyses were conducted to estimate the incidence rate ratios (IRRs) of both outcomes. Ranking of treatments was performed based on probability (P) score. Results: A total of 21 studies were included (26,546 patient-years). When compared with no thromboprophylaxis, NOAC (IRR: 0.11; 95% CI: 0.03-0.40), warfarin (IRR: 0.23; 95% CI: 0.14-0.37), and aspirin (IRR: 0.24; 95% CI: 0.15-0.39) were all associated with significantly lower rates of thromboembolic events. However, the network meta-analysis revealed no significant differences in the rates of major bleeding (NOAC: IRR: 1.45 [95% CI: 0.28-7.43]; warfarin: IRR: 1.38 [95% CI: 0.41-4.69]; and aspirin: IRR: 0.72 [95% CI: 0.20-2.58]). Rankings, which simultaneously analyze competing interventions, suggested that NOACs have the highest P score to prevent thromboembolic events (P score 0.921), followed by warfarin (P score 0.582), aspirin (P score 0.498), and no thromboprophylaxis (P score 0.001). Aspirin tended to have the most favorable overall profile. Conclusions: Aspirin, warfarin, and NOAC are associated with lower risk of thromboembolic events. Recognizing the limited number of patients and heterogeneity of studies using NOACs, the results support the safety and efficacy of NOACs in patients with a Fontan circulation.

Original languageEnglish (US)
Pages (from-to)374-389
Number of pages16
JournalJournal of the American College of Cardiology
Issue number4
StatePublished - Jan 31 2023


  • aspirin
  • nonvitamin K oral anticoagulants
  • single ventricle
  • warfarin
  • Thromboembolism/epidemiology
  • Administration, Oral
  • Humans
  • Treatment Outcome
  • Anticoagulants/adverse effects
  • Hemorrhage/epidemiology
  • Fontan Procedure/adverse effects
  • Aspirin/adverse effects
  • Warfarin/adverse effects
  • Stroke/prevention & control
  • Atrial Fibrillation/complications

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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