What is the prognosis of long QT syndrome (LQTS)?

Updated: Nov 29, 2017
  • Author: Ali A Sovari, MD, FACP, FACC; Chief Editor: Mikhael F El-Chami, MD  more...
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The prognosis is good overall for patients with long QT syndrome (LQTS) treated with beta-blockers (and other therapeutic measures, if needed). Fortunately, episodes of torsade de pointes are usually self-terminating in patients with LQTS; only about 4-5% of cardiac events are fatal.

Patients at high risk (ie, those with aborted cardiac arrest or recurrent cardiac events despite beta-blocker therapy) have a markedly increased risk of sudden death. Treat these patients with an implantable cardioverter-defibrillator (ICDs); their prognosis after implantation of an ICD is good.

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