<s>[INST] <<SYS>> This is a medical question of type : inheritance <</SYS>> Is Jervell and Lange-Nielsen syndrome inherited ? [/INST] This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. Most often, the parents of a child with an autosomal recessive disorder are not affected, but are carriers of one copy of the mutated gene. Some carriers of a KCNQ1 or KCNE1 mutation have signs and symptoms affecting the heart, but their hearing is usually normal. </s>