[Knowledge about warfarin treatment in patients with atrial fibrillation or mechanical prosthetic valves]

Area of Science:

• Cardiology
• Pharmacology
• Patient Education

Context:

• Warfarin is a critical anticoagulant for patients with atrial fibrillation and mechanical prosthetic valves.
• Effective warfarin management requires comprehensive patient understanding of its use, interactions, and monitoring.
• Previous studies indicate potential gaps in patient knowledge regarding complex anticoagulant therapies.

Purpose:

• To assess the level of knowledge regarding warfarin treatment among patients with atrial fibrillation or mechanical prosthetic valves.
• To identify specific areas of deficiency in patient understanding, including drug usage, potential interactions, and International Normalized Ratio (INR) control.
• To evaluate the adequacy of patient education on warfarin therapy in a clinical setting.

Summary:

• A cross-sectional study involving 150 patients treated with warfarin revealed significant knowledge deficits.
• Only 6% of patients achieved a satisfactory score on the OAK test, with major deficiencies noted in understanding drug interactions, complications, and INR management.
• A substantial proportion of patients (40.7%) did not understand the term INR, and 81.3% were unaware of their optimal INR values.

Impact:

• Inadequate patient knowledge about warfarin poses a risk for inappropriate anticoagulation due to its narrow therapeutic window and numerous interactions.
• Findings highlight the urgent need for enhanced patient education strategies to improve warfarin adherence and safety.
• This study underscores the importance of targeted educational interventions to empower patients in managing their anticoagulation therapy effectively.