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Disease Profile

Jervell Lange-Nielsen syndrome

Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.

1-9 / 1 000 000

US Estimated

Europe Estimated

Age of onset





Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease.


Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype.


dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.


recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder.


Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.


Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.


Not applicable


Other names (AKA)

JLNS1; Deafness, congenital, and functional heart disease; Prolonged QT interval in EKG and sudden death;


Congenital and Genetic Diseases; Ear, Nose, and Throat Diseases; Heart Diseases


Jervell Lange-Nielsen syndrome (JLNS) is an inherited disorder characterized by deafness present at birth and abnormalities of the electrical system of the heart. It is a form of long QT syndrome. This refers to the QT interval measurement seen on the electrocardiogram. The severity of cardiac symptoms seen in individuals varies from no apparent symptoms to increasing heartbeat (tachycardia), fainting, and cardiac arrest. There are two different types of JLNS type: 1, caused by mutations in the KCNQ1 gene, and type 2, caused by mutations in the KCNE1 gene. Both types are inherited in an autosomal recessive manner. The treatment of individuals with JLNS focuses on treating hearing loss utilizing devices such as cochlear implants and preventing other symptoms such as fainting and cardiac arrest.[1][2][3]


This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Medical Terms Other Names
Learn More:
80%-99% of people have these symptoms
Bilateral sensorineural hearing impairment
Profound sensorineural hearing impairment
Prolonged QTc interval
30%-79% of people have these symptoms
Loss of consciousness
Passing out
Postexertional malaise
Fainting spell
Torsade de pointes
5%-29% of people have these symptoms
Iron deficiency anemia
Ventricular fibrillation
Percent of people who have these symptoms is not available through HPO
Autosomal recessive inheritance
Congenital sensorineural hearing impairment
Prolonged QT interval
Sudden cardiac death
Premature sudden cardiac death


Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

  • Orphanet lists international laboratories offering diagnostic testing for this condition.


    Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

    Organizations Supporting this Disease

      Learn more

      These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

      Where to Start

      • Genetics Home Reference (GHR) contains information on Jervell Lange-Nielsen syndrome. This website is maintained by the National Library of Medicine.
      • The National Organization for Rare Disorders (NORD) has a report for patients and families about this condition. NORD is a patient advocacy organization for individuals with rare diseases and the organizations that serve them.

        In-Depth Information

        • GeneReviews provides current, expert-authored, peer-reviewed, full-text articles describing the application of genetic testing to the diagnosis, management, and genetic counseling of patients with specific inherited conditions.
        • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
        • MeSH® (Medical Subject Headings) is a terminology tool used by the National Library of Medicine. Click on the link to view information on this topic.
        • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
        • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
          JLNS type 1
          JLNS type 2
        • Online Mendelian Inheritance in Man (OMIM) lists the subtypes and associated genes for Jervell Lange-Nielsen syndrome in a table called Phenotypic Series. Each entry in OMIM includes a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine.
        • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
        • PubMed is a searchable database of medical literature and lists journal articles that discuss Jervell Lange-Nielsen syndrome. Click on the link to view a sample search on this topic.



            1. Dr Giuseppe CELANO, Dr Lia CROTTI, Dr Federica DAGRADI, Pr Peter SCHWARTZ. Jervell and Lange-Nielsen syndrome. Orphanet. October 2009; https://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=en&Expert=90647. Accessed 6/17/2016.
            2. Theresa Lai, Lisbeth Tranebjærg. Jervell and Lange-Nielsen syndrome. NORD. 2016; https://rarediseases.org/rare-diseases/jervell-and-lange-nielsen-syndrome/.
            3. Jervell and Lange-Nielsen syndrome. Genetics Home Reference. April 2006; https://ghr.nlm.nih.gov/condition/jervell-and-lange-nielsen-syndrome. Accessed 6/17/2016.