Improving Guideline-Directed Medical Therapy for HF

Quick Takes

  • Patients who received maximum dosage of guideline-directed medical therapy had an improvement in LVEF, NYHA class, and NT-proBNP.
  • Pharmacological therapy focused on ARNi, an approved BB for HFrEF, an MRA, and a SGLT2i titration to target doses.
  • Despite barriers, 80% of the patients enrolled in the optimization program achieved target doses at 180 days.

Study Questions:

Does a collaborative nurse practitioner (NP) and pharmacist-led optimization program increase the use of guideline-directed medical therapy (GDMT) safely in patients with heart failure (HF)?

Methods:

This was a quality improvement project that included patients with HF with reduced ejection fraction (HFrEF) and HF with midrange EF. The GDMT optimization program was developed as a collaboration between NPs and pharmacists who specialized in HF. Data were collected between September 2020 and April 2023. A stepwise guideline was developed to initiate and titrate each drug class predicated on the guideline recommendation by 2017 and 2022 American Heart Association (AHA)/American College of Cardiology (ACC)/Heart Failure Society of America (HFSA) HF guidelines. Adjustments were made in the stepwise guidelines to allow for patient response to medication, nonadherence to follow-up blood draws, and pending approval of prescription assistance for novel medications (angiotensin receptor-neprilysin inhibitor [ARNi] and sodium glucose cotransporter 2 inhibitor [SGLT2i]). Patients were referred to the program by an HF provider. Patients were educated on the program process, medication side effects, routine blood work, and self-monitoring of weight, blood pressure (BP), and heart rate (HR). The HF NP and pharmacist managed the patient’s GDMT.

The pharmacist called the patient every 2 weeks, and relayed the patient’s BP, HR, and weight to the NP. The NP would respond with a decision regarding medication changes. Beta-blockers (BBs) and ARNi took precedence, followed by addition of SGLT2i and mineralocorticoid receptor antagonists (MRAs). GDMT was adjusted based on kidney function and patient vital signs. SGLT2i were started before MRAs to reduce incidence of hyperkalemia. Diuretic therapy was adjusted based on volume status, especially with the addition of ARNi and SGLT2i. Medications were adjusted one or two at a time depending on BP and HR. Carvedilol was the BB of choice if the patient had a BP >120 mm Hg or HR >80 bpm and angiotensin-converting enzyme inhibitor (ACEi) and ARB were switched to ARNi. A basic metabolic panel was ordered 1 week after every dose of adjustment of ACEi, ARB, or ARNi and 2 weeks after the initiation of SGLT2i. A variety of interventions were used to ensure patients were able to obtain medications.

Results:

A total of 248 patients were enrolled in the GDMT optimization program with a mean age of 62.5 years, 67.7% were male, and 78.6% were White. A total of 198 patients completed the optimization program. Most patients who completed the program received the maximum tolerated dose of ARNi (86.8%), BB (100%), MRA (79.6%), and SGLT2i (68.5%). The mean left ventricular EF (LVEF) improved from 29.9% in the pre-GDMT period to 45.4% in the post-GDMT period (mean of paired differences = 15.4%; 95% confidence interval [CI], 13.6-17.2%; paired t-test: p < 0.001). Patients who achieved target doses also had an improvement in New York Heart Association (NYHA) class (n = 67, 47.5%; p < 0.001) and N-terminal pro–B-type natriuretic peptide (NT-proBNP) (mean paired differences = −1,252.8; 95% CI, −2,225.5 to 280.0; paired t-test: p = 0.12).

Conclusions:

Collaboration between NPs and pharmacists in this quality improvement project demonstrated the ability to independently advance and optimize GDMT safely and systematically. A dedicated HF-specialized team of NPs and pharmacists with the knowledge, understanding, and skill to initiate and optimize GDMT can potentially bridge the gaps in the use of GDMT.

Perspective:

This quality improvement project showed how the problem of underutilization of GDMT can be addressed by empowering clinical decision making through a systematic stepwise titration guideline. The strength of this project was that patients were part of the process through self-monitoring and immediate feedback to achieve target dosing of GDMT. This optimization program could be replicated in other institutions.

Clinical Topics: Cardiovascular Care Team, Heart Failure and Cardiomyopathies

Keywords: Heart Failure, Reduced Ejection Fraction, Nurse Practitioners, Pharmacists, Quality Improvement


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