Functional effects of mutations in KvLQT1 that cause long QT syndrome.

INTRODUCTION The long QT syndrome (LQT) is caused by mutations in genes encoding ion channels that modulate the duration of ventricular action potentials. One of these genes, KVLQT1, encodes an alpha subunit that coassembles with another subunit, hminK, to form the cardiac slow delayed rectifier (I(Ks)) K+ channel. METHODS AND RESULTS The functional… (More)