Personalizing Quality Improvement: Addressing Anticoagulation Gaps in Atrial Fibrillation

INTRODUCTION: Risk of stroke is greater in patients with atrial fibrillation. Anticoagulation is effective at decreasing risk, yet 40-50% of eligible patients are not prescribed anticoagulation and seem to have a concerning gap in care quality. This quality improvement initiative implemented a pharmacist-led approach to identify, verify, and close apparent anticoagulation treatment gaps. METHODS: We included adult primary care patients with diagnosis of atrial fibrillation; congestive heart failure, hypertension, age ≥75 years (doubled), diabetes, stroke/transient ischemic attack (doubled), vascular disease, age 65-74 years, and sex (female) (CHA 2 DS 2 -VASc) score of at least 2, and no current anticoagulant use. We identified patients using claims and electronic health record data and evaluated explanations through chart review and provider contact. A provider outreach protocol was developed and implemented to address opportunities for anticoagulation. RESULTS: Of 242 patients with an apparent gap, 84% had a verified treatment gap. However, 86% of verified treatment gaps were explained through pharmacist chart review and outreach to providers, and they did not require further action. Explanations included spontaneous resolution of atrial fibrillation, patient declining treatment, completion of a procedure to correct atrial fibrillation or mitigate stroke risk, and high bleeding risk. CONCLUSIONS: Relying solely on claims- and electronic health record-based algorithms may substantially overestimate gaps in care quality.