Qualitative Evaluation to Understand Barriers and Facilitators to Prescribing Angiotensin Receptor-Neprilysin Inhibitors (ARNi) and Sodium-Glucose Cotransporter Inhibitors (SGLT2i) in Patients with Heart Failure with Reduced Ejection Fraction (HFrEF).

Background: Despite sodium-glucose cotransporter-2 inhibitors (SGLT2i) and angiotensin receptor/neprilysin inhibitors (ARNi) being cost-effective evidenced-based therapies for the management of Heart Failure with Reduced Ejection Fraction (HFrEF), research shows that less than 30% of patients with HFrEF are prescribed these agents.

Objective: This study aimed to understand clinician-perceived barriers and facilitators to prescribing ARNi and SGLT2i in patients with HFrEF.

Methods: We conducted virtual and in-person semi-structured interviews in a large integrated healthcare delivery system in the United States. Twenty cardiology clinicians managing patients with HFrEF were recruited using purposeful sampling to target providers across professions and practice sites. The interview guide was developed based on a literature review and insights from a practicing cardiologist. It inquired about perceived prescribing behaviors, focusing on factors affecting the use of ARNi and SGLT2i. We identified key themes using rapid qualitative analysis.

Results: Twenty clinicians were interviewed: 13 physicians, five advanced practitioners, and two clinic-based pharmacists. Eighteen interviews were analyzed; we excluded two as the clinicians interviewed did not meet the inclusion criteria. Three major themes were identified: 1) clinician-reported prescribing patterns don't always align with the American College of Cardiology/American Heart Association guidelines for the use of SGLT2i and ARNi due to clinical inertia, lack of familiarity, knowledge, and comfort with use, and concerns over polypharmacy or adverse events, 2) clinician-perceived and actual out-of-pocket cost reduced prescribing of ARNi or SGLT2i to patients, exacerbated by a lack of visibility into patients' prescription coverage, denials of coverage by insurance, and navigating prior authorization related workflows, and 3) incorporation of a clinic-based pharmacist increased the prescribing of these medications.

Conclusions: Increasing cost transparency, implementing interventions to overcome clinical inertia and cost hurdles, and increasing clinic-based pharmacist support may improve evidenced-based prescribing in patients with HFrEF, especially for comparatively novel classes such as ARNi and SGLT2i.