Prolonged QT interval

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• Synonyms

  • Long QT interval

• Causes

  • Class III antiarrhythmic drug
  • Class IA antiarrhythmic drug
  • Hypocalcaemia
  • Hypokalaemia
  • Hypomagnesaemia
  • Hypothermia
  • Terfenadine
  • Thioridazine
  • Haloperidol
  • Tricyclic antidepressant
  • Erythromycin
  • Ketoconazole
  • Ward-Romano syndrome
  • Jervell-Lange-Nielson syndrome
  • Hypothyroidism
  • Myocardial infarction
  • Third degree atrioventricular block
  • Sick sinus syndrome
  • Subarachnoid haemorrhage
  • Paraquat
  • Probucol
  • Mitral valve prolapse

• Effects

  • Torsades de pointes

• Parents

  • Electrocardiographic investigation

• Description

  • "Rx IV beta blocker
  • pace if bradycardic
  • ICD."