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Anticoagulation Therapy After Biologic Aortic Valve Replacement.

Monna E Myllykangas1,2, Tuomas O Kiviniemi3,4, Jarmo M Gunn3,5

  • 1Department of Anesthesiology, Intensive Care, Emergency Care, and Pain Medicine, University of Turku, Turku, Finland.

Frontiers in Cardiovascular Medicine
|July 8, 2021
PubMed
Summary
This summary is machine-generated.

Oral anticoagulation (OAC) after biologic aortic valve replacement (BAVR) may increase stroke risk but decrease death risk. Further research is needed to confirm these findings for long-term patient outcomes.

Keywords:
anticoagulationaortic valvebioprosthetic valveheart valve diseaseheart valve surgery

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Area of Science:

  • Cardiovascular Medicine
  • Pharmacology
  • Medical Informatics

Background:

  • Standard practice recommends 3-month thromboembolism prophylaxis post-biologic aortic valve replacement (BAVR).
  • The long-term impact of continuing oral anticoagulation (OAC) therapy after this period remains unclear.
  • Understanding OAC's role in BAVR patients is crucial for optimizing post-operative care.

Purpose of the Study:

  • To investigate the association between continued oral anticoagulation (OAC) use and long-term prognosis after BAVR.
  • To evaluate the effects of OAC on mortality, stroke incidence, and major bleeding events in BAVR patients.

Main Methods:

  • Utilized nationwide register data encompassing 4,079 individuals who underwent BAVR between 2010 and 2016.
  • Compared outcomes between patients using warfarin or non-vitamin K antagonist oral anticoagulants (NOACs) and those not on OAC.
  • Analyzed the risks of death, stroke, and major bleeding associated with OAC use.

Main Results:

  • OAC users exhibited a significantly higher risk of stroke (HR 2.39, p < 0.001) compared to non-users.
  • Conversely, OAC use was associated with a lower risk of death (HR 0.79, p = 0.016).
  • No significant association was found between OAC use and the risk of major bleeding.

Conclusions:

  • Oral anticoagulation use following BAVR appears linked to an elevated stroke risk but a reduced risk of mortality.
  • These observational findings highlight a complex risk-benefit profile for OAC in BAVR patients.
  • Randomized controlled trials are necessary to validate these results and inform clinical decision-making.