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Findings With Unspecified Accuracy

Jervell and Lange-Nielsen syndrome (JLNS): Likelihood Ratios

Introduction: - Syndrome characterized by congenital deafness, prolonged Q-T interval, and syncopal attacks

  • Hearing loss is congenital, bilateral, and severe to profound
  • AR inheritence, genetically heterogeneous with mutations in KVLQT1 and KCNE1
  • These genes encode for subunits of a potassium channel expressed in the heart and inner ear
  • Romano-Ward syndrome is an AD inherited genetic disease with long Q-T syndrome without associated
  • The prolonged Q-T interval can lead to ventricular arrhythmias, syncopal episodes, and death in childhood
  • Effective treatment with â-adrenergic blockers reduces mortality from 71% to 6%
  • Cummings 5th Ed. Chapter 147 Genetic sensorineural hearing loss

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    Prevalence

    Population / CalculatorPrevalence Comments / Study / Link
    Among children with congenital sensorineural hearing loss 0.21% PMID:9326683
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    The likelihood ratios of findings for Jervell and Lange-Nielsen syndrome (JLNS) are listed below. See the left navigation bar to change the display.

    Findings With Unspecified Accuracy

    Finding +LR-LR Comments, Study
    Sensorineural hearing loss (SNHL) Edit No accuracy specified.

    Study: no study specified.

    Prolonged QTc Edit No accuracy specified.

    Study: no study specified.

    KVLQT1 and KCNE1 genetic mutations Edit No accuracy specified.

    Study: no study specified.