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Madison, Wisconsin 53792

  • Thromboembolism


Hypothesis: Does the time spent within the target INR range differ when patients are managed by AMD or IT models of anticoagulation care? Experimental Design: The 36-month trial enrolled 192 eligible patients currently receiving chronic warfarin therapy at the William S. Middleton Memorial VA Hospital. Consenting patients are enrolled and randomized to 1 of 2 groups: usual clinic care with face-to-face visits every 4 weeks (AMS model) or clinic visits every 3 months with interim laboratory visits and telephone follow-up every 4 weeks (IT model). At study conclusion, the amount of time the INR is within target range will be compared between the two groups. Thromboembolic and bleeding event rates, patient knowledge, quality of life and healthcare utilization will also be analyzed.


Inclusion Criteria: - completion of >3 months of warfarin - indefinite warfarin therapy Exclusion Criteria: - patients who currently receive >25% of INR determinations per year from local labs - extended absences from VA



Primary Contact:

Principal Investigator
Christine Sorkness, Pharm D
University of Wisconsin, Madison

Backup Contact:


Location Contact:

Madison, Wisconsin 53792
United States

There is no listed contact information for this specific location.

Site Status: N/A

Data Source:

Date Processed: April 03, 2020

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