Numerous Brugada syndrome-associated genetic variants have no effect on J-point elevation, syncope susceptibility, malignant cardiac arrhythmia, and all-cause mortality

TY - JOUR

T1 - Numerous Brugada syndrome-associated genetic variants have no effect on J-point elevation, syncope susceptibility, malignant cardiac arrhythmia, and all-cause mortality

AU - Ghouse, Jonas

AU - Have, Christian T

AU - Skov, Morten W

AU - Andreasen, Laura

AU - Ahlberg, Gustav

AU - Nielsen, Jonas B

AU - Skaaby, Tea

AU - Olesen, Søren-Peter

AU - Grarup, Niels

AU - Linneberg, Allan

AU - Pedersen, Oluf

AU - Vestergaard, Henrik

AU - Haunsø, Stig

AU - Svendsen, Jesper H

AU - Hansen, Torben

AU - Kanters, Jørgen K

AU - Olesen, Morten S

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Purpose:We investigated whether Brugada syndrome (BrS)-associated variants identified in the general population have an effect on J-point elevation as well as whether carriers of BrS variants were more prone to experience syncope and malignant ventricular arrhythmia and had increased mortality compared with noncarriers.Methods:All BrS-associated variants were identified using the Human Gene Mutation Database (HGMD). Individuals were randomly selected from a general population study using whole-exome sequencing data (n = 870) and genotype array data (n = 6,161) and screened for BrS-associated variants. Electrocardiograms (ECG) were analyzed electronically, and data on syncope, ventricular arrhythmias, and mortality were obtained from administrative health-care registries.Results:In HGMD, 382 BrS-associated genetic variants were identified. Of these, 28 variants were identified in the study cohort. None of the carriers presented with type 1 BrS ECG pattern. Mean J-point elevation in V1 and V2 were within normal guideline limits for carriers and noncarriers. There was no difference in syncope susceptibility (carriers 8/624; noncarriers 98/5,562; P = 0.51), ventricular arrhythmia (carriers 4/620; noncarriers 9/5,524; P = 0.24), or overall mortality (hazard ratio 0.93, 95% CI 0.63-1.4).Conclusions:Our data indicate that a significant number of BrS-associated variants are not the monogenic cause of BrS.

AB - Purpose:We investigated whether Brugada syndrome (BrS)-associated variants identified in the general population have an effect on J-point elevation as well as whether carriers of BrS variants were more prone to experience syncope and malignant ventricular arrhythmia and had increased mortality compared with noncarriers.Methods:All BrS-associated variants were identified using the Human Gene Mutation Database (HGMD). Individuals were randomly selected from a general population study using whole-exome sequencing data (n = 870) and genotype array data (n = 6,161) and screened for BrS-associated variants. Electrocardiograms (ECG) were analyzed electronically, and data on syncope, ventricular arrhythmias, and mortality were obtained from administrative health-care registries.Results:In HGMD, 382 BrS-associated genetic variants were identified. Of these, 28 variants were identified in the study cohort. None of the carriers presented with type 1 BrS ECG pattern. Mean J-point elevation in V1 and V2 were within normal guideline limits for carriers and noncarriers. There was no difference in syncope susceptibility (carriers 8/624; noncarriers 98/5,562; P = 0.51), ventricular arrhythmia (carriers 4/620; noncarriers 9/5,524; P = 0.24), or overall mortality (hazard ratio 0.93, 95% CI 0.63-1.4).Conclusions:Our data indicate that a significant number of BrS-associated variants are not the monogenic cause of BrS.

U2 - 10.1038/gim.2016.151

DO - 10.1038/gim.2016.151

M3 - Journal article

C2 - 27711072

SN - 1098-3600

VL - 19

SP - 521

EP - 528

JO - Genetics in Medicine

JF - Genetics in Medicine

IS - 5

ER -