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Management

Authoring team

Any drugs which are known to prolong the QT interval should be stopped e.g. quinidine, disopyramide or sotalol.

Some recommend increasing the heart rate by pharmacological means (e.g. isoprenaline 2-10 microgrammes/minute) or by overdrive pacing.

Alternatively a safe and effective emergency treatment is intravenous administration of magnesium sulphate:

  • 1- 2 g of magnesium sulphate i.v. is given over 2-3 min
    • 1-2 g is equivalent to 2-4 ml (4-8 mmol) of 50% magnesium sulphate
  • a further 2 g bolus may be given if necessary
  • a continuous infusion of 2-8 mg/min is commenced
  • if this is ineffective then temporary ventricular pacing is indicated

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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