Case history
Case history #1
A 14-year-old girl, with a history of spells involving loss of consciousness, currently on antiepileptic drugs for a diagnosis of seizure disorder, presents to her pediatrician concerned about recurrent "seizures" despite taking her medication.
Case history #2
An 18-year-old, previously healthy, female college student suddenly collapses while rushing to class on a cold winter morning. Bystanders find her unresponsive and pulseless with agonal breathing. CPR is immediately commenced and emergency medical services are called.
Other presentations
The condition may also be discovered as an incidental ECG finding during the routine investigation of an unrelated presenting complaint. For example, a patient referred to a cardiologist with a concern of a heart murmur, determined to be an innocent flow murmur, may have an initial ECG revealing a prolonged corrected QT interval (QTc) of 0.49 seconds, suggesting the presence of LQTS.
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