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Outcomes of Direct Oral Anticoagulants in Patients With Mitral Stenosis

Ju Youn Kim1, Sung-Hwan Kim2, Jun-Pyo Myong3

  • 1Division of Cardiology, Department of Internal Medicine, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, South Korea.

Journal of the American College of Cardiology
|March 16, 2019
PubMed

Insights

Direct oral anticoagulants (DOACs) show promise in preventing thromboembolism for patients with mitral stenosis and atrial fibrillation (AF). This study suggests DOACs may be a safer alternative to warfarin, warranting further investigation.

Area of Science:

  • Cardiology
  • Pharmacology
  • Clinical Research

Background:

  • Patients with mitral stenosis and atrial fibrillation (AF) require anticoagulation for stroke prevention.
  • Previous studies excluded patients with moderate to severe mitral stenosis from direct oral anticoagulant (DOAC) trials.
  • This gap highlights the need to evaluate DOAC efficacy in this specific patient population.

Purpose of the Study:

  • To validate the efficacy and safety of direct oral anticoagulants (DOACs) in patients diagnosed with mitral stenosis and atrial fibrillation (AF).
  • To compare the effectiveness of DOACs against conventional warfarin treatment for stroke prevention in this cohort.

Main Methods:

  • Retrospective cohort study utilizing the Health Insurance Review and Assessment Service (HIRA) database in the Republic of Korea.
  • Inclusion criteria: diagnosed mitral stenosis and AF, prescribed either DOACs (off-label use) or warfarin.
  • Primary efficacy endpoint: ischemic stroke or systemic embolism; Safety endpoint: intracranial hemorrhage.

Main Results:

  • A total of 2,230 patients were analyzed.
  • DOACs demonstrated a significantly lower rate of thromboembolic events (2.22%/year) compared to warfarin (4.19%/year), with an adjusted hazard ratio of 0.28.
  • The rate of intracranial hemorrhage was also lower in the DOAC group (0.49%/year) versus warfarin (0.93%/year).

Conclusions:

  • Direct oral anticoagulant (DOAC) use appears promising for preventing thromboembolism in patients with mitral stenosis and atrial fibrillation (AF).
  • The findings suggest DOACs may offer a favorable risk-benefit profile compared to warfarin in this population.
  • Further validation through randomized controlled trials is recommended to confirm these hypothesis-generating results.
Abstract

Keywords:
atrial fibrillationintracranial hemorrhageischemic strokemitral stenosissystemic embolism

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