Prolongation of the electrocardiographic QT interval, a measure of cardiac repolarization, is associated with arrhythmogenic disorders and is a risk factor for sudden cardiac death. Two genome-wide association studies (GWAS) of variation in the QT interval in population-based cohorts now report association with variants in a subset of ion channel genes and other new associations.

中文翻译：

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心脏复极的遗传学。

心电图 QT 间期延长是心脏复极的一种衡量标准，与心律失常相关，是心脏性猝死的危险因素。两项基于人群的队列中 QT 间期变异的全基因组关联研究 (GWAS) 现在报告与离子通道基因子集的变异和其他新关联的关联。