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Jervell and Lange?Nielsen Syndrome is a rare, severe genetic disorder characterized by two major, life-threatening defects: profound congenital hearing loss and a severe heart rhythm disorder (Long QT syndrome).
read more about jervelllangenielsen syndrome ...The cause is a mutation in genes (KCNE1 or KCNQ1) that control potassium ion channels. These potassium channels are necessary for both the inner ear (hearing) and the heart (rhythm) to function correctly. The defective channels prolong the electrical recharge time of the heart, leading to an unstable rhythm. The fact that a single genetic defect causes both deafness and a fatal heart problem is the defining feature of the syndrome.
Symptoms define a major dual sensory and cardiac problem. Infants are born with profound deafness. The heart condition causes episodes of fainting (syncope) or sudden cardiac arrest, often triggered by noise, stress, or physical exertion.
Jervell and Lange?Nielsen Syndrome does not directly impact vision. However, the chronic risk of fainting and sudden cardiac events requires the patient to have their environment carefully controlled. Rapid blood pressure drops during fainting episodes can cause temporary blurred vision or darkening of the visual field.
Diagnosis relies on confirming both defects. The doctor confirms congenital deafness with hearing tests. An Electrocardiogram (ECG) confirms the Long QT Syndrome (a prolonged QT interval), which is the life-threatening cardiac defect.
Necessary management strategies focus on preventing sudden cardiac death. Treatment involves beta-blockers to stabilize the heart rhythm and, in high-risk patients, the surgical implantation of an Implantable Cardioverter-Defibrillator (ICD).
No, the condition is a lifelong genetic disorder, but the cardiac risk is highly manageable with medication and an ICD.
The hearing loss is profound and permanent. Cochlear implants may be used to restore some hearing function.
Yes, the cardiac risk is lifelong and requires continuous management.
Consult a cardiologist immediately if a child with hearing loss has fainting spells. This syndrome causes dangerously fast heart rhythms. An EKG is a medical necessity to measure the corrected QT interval and determine if a beta-blocker is required.
Consult a cardiologist immediately if a child with hearing loss has fainting spells. This syndrome causes dangerously fast heart rhythms. An EKG is a medical necessity to measure the corrected QT interval and determine if a beta-blocker is required.