has material basis in germline mutation in KCNQ1 Jervell and Lange-Nielsen syndrome Jervell and Lange-Nielsen syndrome 1 https://github.com/monarch-initiative/mondo/issues/4521 https://www.malacards.org/card/jervell_and_lange_nielsen_syndrome_1 MONDO:0024540 Jervell and Lange-Nielsen syndrome caused by mutation in KCNQ1 Jervell and Lange-Nielsen syndrome KCNQ1 Jervell and Lange-Nielsen syndrome deafness, congenital, and functional heart disease Cardioauditory syndrome of Jervell and Lange-Nielsen JLNS1 GARD:0025421 UMLS:C4551509 Jervell and Lange-Nielsen syndrome 1 Surdo-Cardiac syndrome Any Jervell and Lange-Nielsen syndrome in which the cause of the disease is a mutation in the KCNQ1 gene. prolonged QT interval in Ekg and sudden death OMIM:220400 MEDGEN:1646925