BACKGROUND: Loss-of-function mutations in the gene KCNQ1 encoding the Kv7.1 K(+) channel cause long QT syndrome type 1 (LQT1), whereas gain-of-function mutations are associated with short QT syndrome as well as familial atrial fibrillation (FAF). However, KCNQ1 mutation pleiotropy, which is capable of expressing both[…]
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