An 80-year-old patient who has persistent AF takes warfarin (Coumadin)for anticoagulation therapy.The patient has an INR of 3.5.The primary care NP should consider:

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This patient's INR is only minimally prolonged,so no dose reduction is required.The NP should recheck the INR periodically.If the INR becomes more prolonged,lowering the dose of warfarin is recommended.If the INR approaches 5,omitting a dose and resuming at a lower dose is recommended.Vitamin K is used for an INR of 9 or greater.

An 80-Year-Old Patient Who Has Persistent AF Takes Warfarin (Coumadin)for