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[Anticoagulation with atrial fibrillation].

S Zellerhoff1, A Goette, P Kirchhof

  • 1Medizinische Klinik und Poliklinik C, Kardiologie und Angiologie, Kompetenznetz Vorhofflimmern, Universitätsklinikum Münster, Albert-Schweitzer-Strasse 33, 48149, Münster, Germany.

Herzschrittmachertherapie & Elektrophysiologie
|June 21, 2006
PubMed
Summary

Atrial fibrillation significantly increases stroke risk. Continuous oral anticoagulation, particularly with vitamin K antagonists, is crucial for preventing over half of these ischemic strokes when properly monitored.

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Area of Science:

  • Cardiology
  • Neurology
  • Pharmacology

Context:

  • Atrial fibrillation (AF) is a major risk factor for ischemic stroke, accounting for 20-25% of all strokes.
  • Individual stroke risk in AF patients ranges from 2% to 14% annually, necessitating risk stratification.
  • Current guidelines recommend continuous oral anticoagulation for AF patients with at least one additional thromboembolic risk factor.

Purpose:

  • To review the role of oral anticoagulation in preventing stroke in atrial fibrillation patients.
  • To discuss the efficacy and monitoring requirements of vitamin K antagonists.
  • To highlight the potential of novel anticoagulants.

Summary:

  • Oral anticoagulation, primarily with vitamin K antagonists (VKAs), is highly effective in preventing ischemic strokes in atrial fibrillation (AF) patients with risk factors.

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  • Therapeutic anticoagulation with VKAs (INR 2-3) prevents over 50% of AF-related strokes with rare bleeding complications.
  • Regular monitoring is essential for VKAs due to their narrow therapeutic index; alternative causes should be investigated if stroke occurs despite anticoagulation.

    • Impact:

    • Effective anticoagulation management significantly reduces stroke incidence and improves patient outcomes in atrial fibrillation.
    • Well-controlled anticoagulation offers a favorable risk-benefit profile, preventing major disability from stroke.
    • Emerging anticoagulants may offer improved safety and convenience for stroke prevention in atrial fibrillation.