Abstract
Background and Objectives
Atrial fibrillation (AF) is highly prevalent in older adults and has been associated with increased morbidity and mortality. To reduce this AF-related morbidity in older adults, antiarrhythmic drugs (AADs) are regularly used for rhythm control, assuming that increasing time in sinus rhythm reduces AF-related morbidity. However, whether AADs can improve clinical outcomes in older adults remains unclear because of the increased risk for adverse drug events compared with rate control. The aim of this study was to determine the impact of rhythm control versus rate control on clinical outcomes in older adults with AF.
Design and Methods
We conducted a systematic review and meta-analysis targeting patients aged ≥65 years with AF and using drugs to control rate or rhythm. Articles that met the following criteria were included: enrolled older patients (sample mean ≥75 years) with AF, compared pharmacological rate versus rhythm control, and reported all-cause mortality, cardiovascular mortality, or ischemic stroke.
Results
Five observational studies were included. In total, 86,926 patients with AF with a mean age ranging from 75 to 92 years were studied. No differences were found between rhythm and rate control for all-cause mortality (odds ratio [OR] 1.11; 95% confidence interval [CI] 0.78–1.59; I2 = 79.6%; n = 28,526; four studies) and cardiovascular mortality (OR 1.09; 95% CI 0.81–1.47; I2 = 0%; n = 2292; two studies). Rhythm control resulted in fewer strokes (OR 0.86; 95% CI 0.80–0.93; I2 = 0%; n = 59,496), although this was mainly determined by one study.
Conclusion
All collected data were observational, which precluded making strong recommendations. Furthermore, all CIs were wide, increasing the uncertainty of the observed effects. As such, evidence was insufficient to recommend rhythm or rate control as the first-line therapy for AF in older adults. As AF is particularly prevalent in older people, more randomized controlled trials are needed in this population.
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L. Depoorter, L. Sels, M. Deschodt, and B. Van Grootven have no potential conflicts of interest that might be relevant to the contents of this manuscript. L. Van der Linden and J. Tournoy have received lecture or consulting fees from Pfizer, Bristol-Meyers Squibb, Bayer, and Daichii Sankyo.
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Depoorter, L., Sels, L., Deschodt, M. et al. Clinical Outcomes of Rate vs Rhythm Control for Atrial Fibrillation in Older People: A Systematic Review and Meta-Analysis. Drugs Aging 37, 19–26 (2020). https://doi.org/10.1007/s40266-019-00722-4
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DOI: https://doi.org/10.1007/s40266-019-00722-4