Do antiarrhythmics prevent sudden death in patients with heart failure?
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Beta-blockers (class II antiarrhythmics) reduce sudden death and total mortality in patients with heart failure (strength of recommendation [SOR]: A, based on systematic reviews of randomized controlled trials). Amiodarone (class III) may reduce sudden death in heart failure (SOR: B, extrapolation from randomized controlled trials), but evidence is weak that it reduces total mortality, and it has significant side effects. Class I and other class III antiarrhythmic agents appear cause an increase in mortality due to sudden death in heart failure (SOR: B, extrapolations from randomized controlled trials).
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