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The ST-segment and adjacent T-wave (ST-T wave) amplitudes of the electrocardiogram are quantitative characteristics of cardiac repolarization. Repolarization abnormalities have been linked to ventricular arrhythmias and sudden cardiac death. We performed the first genome-wide association meta-analysis of ST-T-wave amplitudes in up to 37 977 individuals identifying 71 robust genotype-phenotype associations clustered within 28 independent loci. Fifty-four genes were prioritized as candidates underlying the phenotypes, including genes with established roles in the cardiac repolarization phase (SCN5A/SCN10A, KCND3, KCNB1, NOS1AP and HEY2) and others with as yet undefined cardiac function. These associations may provide insights in the spatiotemporal contribution of genetic variation influencing cardiac repolarization and provide novel leads for future functional follow-up.

Original publication

DOI

10.1093/hmg/ddw058

Type

Journal article

Journal

Hum Mol Genet

Publication Date

15/05/2016

Volume

25

Pages

2093 - 2103

Keywords

Adaptor Proteins, Signal Transducing, Arrhythmias, Cardiac, Basic Helix-Loop-Helix Transcription Factors, Brugada Syndrome, Cardiac Conduction System Disease, Death, Sudden, Cardiac, Electrocardiography, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, Heart Conduction System, Humans, Male, NAV1.5 Voltage-Gated Sodium Channel, Polymorphism, Single Nucleotide, Repressor Proteins, Shab Potassium Channels, Shal Potassium Channels