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Withdrawal of Neurohumoral Blockade After Cardiac Resynchronization Therapy. | LitMetric

Withdrawal of Neurohumoral Blockade After Cardiac Resynchronization Therapy.

J Am Coll Cardiol

Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium; Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium. Electronic address:

Published: March 2020

AI Article Synopsis

Article Abstract

Background: The necessity of neurohumoral blockers in patients with heart failure who demonstrate normalized ejection fractions after cardiac resynchronization therapy remains unclear.

Objectives: The aim of this study was to investigate the feasibility and safety of neurohumoral blocker withdrawal in patients with normalized ejection fractions after cardiac resynchronization therapy.

Methods: In this prospective, open-label, randomized controlled pilot trial with a 2 × 2 factorial design, subjects were randomized to withdrawal of renin-angiotensin-aldosterone system inhibitors and/or beta-blockers versus continuation of treatment. The primary endpoint was a recurrence of negative remodeling, defined as an increase in left ventricular end-systolic volume index of >15% at 24 months. The secondary endpoint was a composite safety endpoint of all-cause mortality, heart failure-related hospitalizations, and incidence of sustained ventricular arrhythmias at 24 months.

Results: Eighty subjects were consecutively enrolled and randomized among 4 groups (continuation of neurohumoral blocker therapy, n = 20; withdrawal of renin-angiotensin-aldosterone system inhibitors, n = 20; withdrawal of beta-blockers, n = 20; and withdrawal of renin-angiotensin-aldosterone system inhibitors and beta-blockers, n = 20). Of the 80 subjects, 6 (7.5%) met the primary and 4 (5%) the secondary endpoint. However, re-initiation of neurohumoral blockers occurred in 17 subjects because of hypertension or supraventricular arrhythmias.

Conclusions: The incidence of the primary and secondary endpoints over a follow-up period of 2 years was low in both the control group and in the groups in which neurohumoral blockers were discontinued. However, neurohumoral blocker withdrawal was hampered by cardiac comorbidities. (Systematic Withdrawal of Neurohumoral Blocker Therapy in Optimally Responding CRT Patients [STOP-CRT]; NCT02200822).

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http://dx.doi.org/10.1016/j.jacc.2020.01.040DOI Listing

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