KCNQ1 and familial long QT syndrome: Two clinical forms of LQTS have been described: Romano–Ward syndrome (RWS), which follows an autosomal dominant pattern of inheritance, and Jervell and Lange-Nielsen syndrome (JLNS), which follows an autosomal recessive pattern of inheritance and is associated with sensorineural deafness (a recessive Romano–Ward syndrome associated with compound heterozygosity for two mutations in the KVLQT1 gene, as described by Lars Allan Larsen).