Abstract
Background
The use of guideline-directed medical therapy (GDMT) is poorly described in patients with heart failure and reduced ejection fraction (HFrEF) with cardiac resynchronization therapy (CRT) and/or implantable cardioverter defibrillators (ICDs).
Objective
To define the eligibility, uptake, dose, contraindications, and barriers to uptake of contemporary medical therapy in this population.
Methods
Retrospective analysis of consecutive adults with ICD and/or CRT attending two Canadian tertiary centre device clinics between 1 March and 31 May 2021.
Results
From 1005 device clinic consultations, 227 (22.6%) patients with HFrEF and CRT and/or ICD were included. GDMT eligibility was high: beta-blockers (99.6%), mineralocorticoid receptor antagonists (MRA) (89.0%), angiotensin receptor–neprilysin inhibitors (ARNI) (84.6%), and sodium-glucose cotransporter-2 inhibitors (SGLT2I) (87.7%). Contraindications were rare: beta-blockers (0.4%), MRA (11.0%), ARNI (15.4%), and SGLT2I (12.3%). Uptake of GDMT was high for beta-blockers (97.4%) but low for other medications: MRA (63.0%), ARNI (46.7%), SGLT2I (22.9%). Except for SGLT2I (84.6%) and beta-blockers (57.9%), less than one-half of patients were prescribed target-doses of MRA (10.5%), and ARNI (47.7%). Of the visits, GDMT was already optimal in 16%, electrophysiologists acted in 33% (21% prescribed, 7% ordered investigations, 5% referred to heart function services), and in the remaining visits, optimization was either deferred to another cardiologist (20%) or no plan was mentioned (25%), besides other reasons (4%).
Conclusion
Despite broad eligibility for GDMT in patients with HFrEF and ICD/CRT, significant gaps in prescription and titration exist. Our results highlight the need to embed quality assurance initiatives in cardiac device clinics to improve HFrEF care.
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Abbreviations
- ACEI:
-
Angiotensin-converting enzyme inhibitor
- ARB:
-
Angiotensin receptor blocker
- ARNI:
-
Angiotensin receptor–neprilysin inhibitor
- CRT:
-
Cardiac resynchronization therapy
- GDMT:
-
Guideline directed medical therapy
- HF:
-
Heart failure
- HFrEF:
-
Heart failure with reduced ejection fraction
- ICD:
-
Implantable cardioverter defibrillator
- LVEF:
-
Left ventricular ejection fraction
- MRA:
-
Mineralocorticoid receptor antagonist
- SGLT2I:
-
Sodium-glucose cotransporter-2 inhibitors
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Financial interests: JA received grants and personal fees from Medtronic, Bayer, BMS-Pfizer, Servier; grants from Baylis; personal fees from Biosense-Webster. SS received salary support for quality improvement from Novartis, MD received grants and personal fees from Biosense Webster, personal fees from Medtronic, Bayer, BMS-Pfizer and Abbott, and NH received speakers’ fees from Novartis.
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After discussion with the Research Ethics Board the study was exempted from further review since quality improvement activities are exempt under article 2.5 of TCPS2, the overarching ethical framework for research involving human participants in Canada.
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Salimian, S., Moghaddam, N., Deyell, M.W. et al. Defining the gap in heart failure treatment in patients with cardiac implantable electronic devices. Clin Res Cardiol 112, 158–166 (2023). https://doi.org/10.1007/s00392-022-02123-x
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DOI: https://doi.org/10.1007/s00392-022-02123-x