Brugada syndrome-associated genetic loci are associated with J-point elevation and an increased risk of cardiac arrest

Research output: Contribution to journalArticle

Abstract

Introduction: A previous genome-wide association study found three genetic loci, rs9388451, rs10428132, and rs11708996, to increase the risk of Brugada Syndrome (BrS). Since the effect of these loci in the general population is unknown, we aimed to investigate the effect on electrocardiogram (ECG) parameters and outcomes in the general population. Materials and Methods: A cohort of 6,161 individuals (median age 45 [interquartile range (IQR) 40-50] years, 49% males), with available digital ECGs, was genotyped and subsequently followed for a median period of 13 [IQR 12.6-13.4] years. Data on outcomes were collected from Danish administrative healthcare registries. Furthermore, ~400,000 persons from UK Biobank were investigated for associations between the three loci and cardiac arrest/ventricular fibrillation (VF). Results: Homozygote carriers of the C allele in rs6800541 intronic to SCN10A had a significantly larger J-point elevation (JPE) compared with wildtype carriers (11 vs. 6 μV, P < 0.001). There was an additive effect of carrying multiple BrS-associated risk alleles with an increased JPE in lead V1. None of the BrS-associated genetic loci predisposed to syncope, atrial fibrillation, or total mortality in the general Danish population. The rs9388451 genetic locus adjacent to the HEY2 gene was associated with cardiac arrest/VF in an analysis using the UK Biobank study (odds ratio = 1.13 (95% confidence interval: 1.08-1.18), P = 0.006). Conclusions: BrS-associated risk alleles increase the JPE in lead V1 in an additive manner, but was not associated with increased mortality or syncope in the general population of Denmark. However, the HEY2 risk allele increased the risk of cardiac arrest/VF in the larger population study of UK Biobank indicating an important role of this common genetic locus.

Details

Authors
  • Laura Andreasen
  • Jonas Ghouse
  • Morten W. Skov
  • Christian T. Have
  • Gustav Ahlberg
  • Peter V. Rasmussen
  • Allan Linneberg
  • Oluf Pedersen
  • Pyotr G. Platonov
  • Stig Haunsø
  • Jesper H. Svendsen
  • Torben Hansen
  • Jørgen K. Kanters
  • Morten S. Olesen
Organisations
External organisations
  • Copenhagen University Hospital
  • University of Copenhagen
  • Danish National Research Foundation Centre for Cardiac Arrhythmia
  • Research Centre for Prevention and Health
  • Skåne University Hospital
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cardiac and Cardiovascular Systems

Keywords

  • Brugada Syndrome, Electrocardiogram, General population, Mortality, Single nucleotide polymorphism
Original languageEnglish
Article number894
JournalFrontiers in Physiology
Volume9
Issue numberJUL
Publication statusPublished - 2018 Jul 10
Publication categoryResearch
Peer-reviewedYes