Does Warfarin Use Impact Hospital Length of Stay? A Retrospective Study Looking at Patients Treated for Atrial Fibrillation

189 hospitalized patients admitted with a primary, secondary, or most responsible diagnosis of paroxysmal or chronic atrial fibrillation at a large, tertiary care, academic center.

In-hospital initiation of warfarin to achieve a minimum international normalized ratio (INR) of 2.0 before discharge.

Average hospital length of stay (LOS) and identification of patients with a documented prolonged LOS secondary due to subtherapeutic INR at the time of potential discharge.