Cited by 2,100Atrial Fibrillation Management and OutcomesAcute Ischemic Stroke ManagementCardiac pacing and defibrillation studies

Subclinical atrial fibrillation and the risk of stroke

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Healey, Jeff S., Connolly, Stuart J., Gold, Michael R., Israel, Carsten W., Van Gelder, Isabelle C., Capucci, Alessandro, Lau, C.P., Fain, Eric +7 more·2012·New England Journal of Medicine

Abstract

BACKGROUND: One quarter of strokes are of unknown cause, and subclinical atrial fibrillation may be a common etiologic factor. Pacemakers can detect subclinical episodes of rapid atrial rate, which correlate with electrocardiographically documented atrial fibrillation. We evaluated whether subclinical episodes of rapid atrial rate detected by implanted devices were associated with an increased risk of ischemic stroke in patients who did not have other evidence of atrial fibrillation. METHODS: We enrolled 2580 patients, 65 years of age or older, with hypertension and no history of atrial fibrillation, in whom a pacemaker or defibrillator had recently been implanted. We monitored the patients for 3 months to detect subclinical atrial tachyarrhythmias (episodes of atrial rate >190 beats per minute for more than 6 minutes) and followed them for a mean of 2.5 years for the primary outcome of ischemic stroke or systemic embolism. Patients with pacemakers were randomly assigned to receive or not to receive continuous atrial overdrive pacing. RESULTS: By 3 months, subclinical atrial tachyarrhythmias detected by implanted devices had occurred in 261 patients (10.1%). Subclinical atrial tachyarrhythmias were associated with an increased risk of clinical atrial fibrillation (hazard ratio, 5.56; 95% confidence interval [CI], 3.78 to 8.17; P<0.001) and of ischemic stroke or systemic embolism (hazard ratio, 2.49; 95% CI, 1.28 to 4.85; P=0.007). Of 51 patients who had a primary outcome event, 11 had had subclinical atrial tachyarrhythmias detected by 3 months, and none had had clinical atrial fibrillation by 3 months. The population attributable risk of stroke or systemic embolism associated with subclinical atrial tachyarrhythmias was 13%. Subclinical atrial tachyarrhythmias remained predictive of the primary outcome after adjustment for predictors of stroke (hazard ratio, 2.50; 95% CI, 1.28 to 4.89; P=0.008). Continuous atrial overdrive pacing did not prevent atrial fibrillation. CONCLUSIONS: Subclinical atrial tachyarrhythmias, without clinical atrial fibrillation, occurred frequently in patients with pacemakers and were associated with a significantly increased risk of ischemic stroke or systemic embolism. (Funded by St. Jude Medical; ASSERT ClinicalTrials.gov number, NCT00256152.).

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Crossref · 10.1056/nejmoa1105575

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Authors
Healey, J. S., Connolly, S. J., Gold, M. R., Israel, C. W., Van Gelder, I. C., Capucci, A., Lau, C. P., Fain, E., Yang, S., Bailleul, C., Morillo, C. A., Carlson, M., Themeles, E., Kaufman, E. S., & Hohnloser, S. H.
Affiliations
  • Population Health Research Institute (CA)
  • Medical University of South Carolina (US)
  • Goethe University Frankfurt (DE)
  • Marche Polytechnic University (IT)
  • Queen Mary Hospital (CN)
  • MetroHealth (US)
Venue
New England Journal of Medicine
Published
2012-01-12
Volume
366
Issue
2
Pages
120-129
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2154658516
Cited by
2,100
References
37
Citations by year
2026: 87 · 2025: 104 · 2024: 137 · 2023: 116 · 2022: 134 · 2021: 153 · 2020: 148 · 2019: 162 · 2018: 154 · 2017: 154 · 2016: 162 · 2015: 146 · 2014: 181 · 2013: 133 · 2012: 124
FWCI
120.21
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion)
  • Università Politecnica delle Marche (Università Politecnica delle Marche) (submittedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
  • Health Sciences › Medicine › Epidemiology › Acute Ischemic Stroke Management
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
Keywords
subclinical atrial fibrillation, atrial tachyarrhythmia, ischemic stroke, systemic embolism, atrial overdrive pacing, atrial fibrillation risk, hypertension, elderly patients, population attributable risk, stroke prevention, cardiac implantable electronic devices, atrial fibrillation detection, atrial fibrillation prevention
MeSH terms
Aged, Aged, 80 and over, Atrial Fibrillation, Cardiac Pacing, Artificial, Embolism, Female, Humans, Hypertension, Male, Pacemaker, Artificial, Prospective Studies, Risk, Defibrillators, Implantable, Stroke

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