Expert queries warfarin instability claims

An Australian cardiologist has dismissed recommendations from US researchers to switch seemingly stable warfarin patients to novel oral anticoagulants.

The recommendations follow a US study of 3749 AF patients taking warfarin, which found that only 26% were ‘stable’ in an initial, six-month monitoring period.

Stable was defined as having 80% or more INR readings within the range of 2.0-3.0.

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