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Wide Complex Tachycardia

 
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Overview

  • Ventricular tachycardia (VT) is an imminently life-threatening arrhythmia that must be rapidly diagnosed and treated. Supraventricular tachycardia is a more benign arrhythmia that may also present as a wide complex tachycardia when combined with aberrant conduction; this can be difficult to distinguish from VT.
  • This section includes a list of causes of wide complex tachycardia, as well as a guide to key findings used to distinguish between causes.
    • Causes of Wide Complex Tachycardia

    • Regular

    • Monomorphic ventricular tachycardia
    • Supraventricular tachycardia with aberrant conduction (bundle branch block)
    • Supraventricular tachycardia with preexcitation (accessory pathway)
    • Pacemaker-mediated tachycardia - atrial tracking or endless loop tachycardia
    • Irregular

    • Polymorphic ventricular tachycardia
    • Atrial fibrillation with aberrant conduction (bundle branch block)
    • Atrial fibrillation with preexcitation (accessory pathway)
    • Other

    • Artefact - due to CPR, shivering, shaking or other movements
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