1.0The Texas Heart Institute®https://www.texasheart.orgKeri Sprunghttps://www.texasheart.org/author/keri/Long Q-T Syndromerich600338<blockquote class="wp-embedded-content" data-secret="3xBRw7hIbX"><a href="https://www.texasheart.org/heart-health/heart-information-center/topics/long-q-t-syndrome/">Long Q-T Syndrome</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.texasheart.org/heart-health/heart-information-center/topics/long-q-t-syndrome/embed/#?secret=3xBRw7hIbX" width="600" height="338" title="“Long Q-T Syndrome” — The Texas Heart Institute®" data-secret="3xBRw7hIbX" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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https://www.texasheart.org/wp-content/uploads/2018/02/thi-ekg.jpg20481152Long Q-T syndrome (LQTS) is a disorder of the heart's conduction system. It affects repolarization, the recharging of the heart after each heartbeat, and is diagnosed by electrocardiogram (EKG or ECG). LQTS can lead to an abnormal rhythm (arrhythmia); fainting or loss of consciousness (syncope); or even sudden death.