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Definition of Long QT syndrome

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Long QT syndrome: A disorder of the heart's electrical system that predisposes individuals to irregular heartbeats, fainting spells, and sudden death. The irregular heartbeats are typically brought on by stress or vigorous activity. Abbreviated LQTS. LQTS is often symptomless and undiagnosed, but it is well known as a cause of sudden cardiac death in young, apparently healthy people, most notably competitive athletes. QT refers to an interval seen in an electrocardiogram (EKG) test of heart function. There are multiple genetic forms of LQTS. Romano-Ward syndrome is an autosomal dominant form of LQTS. The Jervell and Lange-Nielsen syndrome is an autosomal recessive form of LQTS and is characterized by congenital profound bilateral sensorineural hearing loss and long QT interval.

QUESTION

In the U.S., 1 in every 4 deaths is caused by heart disease. See Answer
Reviewed on 12/27/2018

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