LQTS is a disturbance of the heart’s electrical system, resulting in an abnormality of the heartbeat or rhythm of the heart. It is caused by abnormalities of microscopic pores in the heart cells called ion channels.
Nearly half of patients with LQTS NEVER HAVE A SYMPTOM!
Cardiac arrest or sudden fainting due to trademark cardiac arrhythmia called torsade de pointes. Most often, these events occur during or right after physical exertion, with emotional stress or startle (alarm clock). Sometimes they occur during sleep.
Family history of a SADS diagnosis, SADS symptoms, or sudden unexplained death of a family member under 40 years of age.
Electrocardiogram (ECG) and more than 1 resting ECG
A treadmill stress test with an ECG
An epinephrine, procainamide (Brugada), or catecholiminergic (CPVT) drug study - where the effects of drugs on the heart are analyzed.
A Holter or event monitor
Medication, beta blockers
Left Cardiac Sympathectomy Denervation (LCSD)
that can prolong the QT Interval