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Related Experiment Videos

Amiodarone for refractory atrial fibrillation.

R L Gold, C I Haffajee, G Charos

    The American Journal of Cardiology
    |January 1, 1986
    PubMed
    Summary

    Amiodarone effectively treats atrial fibrillation (AF) in most patients, maintaining normal sinus rhythm long-term. However, chronic AF exceeding one year may reduce treatment success, and some patients experience adverse effects.

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    Area of Science:

    • Cardiology
    • Pharmacology

    Background:

    • Atrial fibrillation (AF) presents management challenges with antiarrhythmic drugs.
    • Amiodarone is recognized for its efficacy in restoring sinus rhythm for AF patients.
    • Mechanisms and predictors of amiodarone's effectiveness in AF require further elucidation.

    Purpose of the Study:

    • To evaluate the efficacy and identify predictors of success for amiodarone therapy in patients with refractory atrial fibrillation.
    • To examine various measures of success and failure in amiodarone treatment for AF.

    Main Methods:

    • A study involving 68 patients with paroxysmal or chronic AF refractory to standard treatments.
    • Patients received maintenance amiodarone dosages of 200-400 mg/day.
    • Follow-up averaged 21 months (range 3-56 months).

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    Main Results:

    • Amiodarone therapy demonstrated long-term efficacy in 79% (54/68) of patients.
    • Left atrial diameter, age, gender, and AF origin did not predict treatment outcomes.
    • Chronic AF for over 1 year was associated with reduced success (p=0.007), though 57% still benefited.

    Conclusions:

    • Amiodarone is a highly effective long-term treatment for many patients with refractory atrial fibrillation.
    • While predictors like age and AF origin were not significant, AF duration over one year negatively impacted efficacy.
    • Adverse effects occurred in 35% of patients, leading to discontinuation in 10%.