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Conditions We Treat: Long QT Syndrome (LQTS)

Long QT Syndrome (LQTS) is a rare malfunction in the way the heart cells recharge after producing electricity. This malfunction can lead to a dangerous arrhythmia causing fainting or even sudden death.

Long QT Syndrome: What You Need to Know

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  • LQTS is either inherited or acquired (acquired LQTS is usually drug induced). Symptoms sometimes occur only under a combination of factors, such as several drugs taken together.
  • Diagnosis is usually via electrocardiogram (ECG/EKG) or blood tests for electrolyte imbalances.
  • If you have been diagnosed with inherited LQTS, your family members should be tested as well.
  • The goals of treatment are to improve the ability of the heart cells to generate an electrical charge and/or to stabilize the heart's rhythm using an implanted device.

The "QT" in long QT syndrome refers to the waves on an electrocardiogram, which are labeled P, Q, R, S and T. Q through T represent the recharging of the cells after a heart-muscle contraction.

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Why choose Johns Hopkins Heart and Vascular Institute for treatment of long QT syndrome?


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Our Specialty Centers

The Johns Hopkins Center for Inherited Diseases counsels and screens patients and their families at risk for LQTS.

Learn more about the Center for Inherited Heart Diseases.
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Our Patient Care

Kim Bauhs was about to address a meeting when she collapsed in cardiac arrest. Only the persistence of Johns Hopkins physicians helped Kim confront a life-saving diagnosis.

Read Kim's story.