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Figure 1 Reason for Diagnosis of LQTS
The diagnosis of long QT syndrome (LQTS) was most often made because of a family history and an abnormal electrocardiogram (ECG) obtained as a screening tool. As shown here in blue, 53% of our patients were diagnosed as a result of family screening. In red are the patients diagnosed after presentation with syncope. Sudden death or resuscitated sudden death was present in only 3% of patients, and 17% were diagnosed because of an abnormal ECG in the absence of symptoms or a family history of LQTS.
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