Classification by Mechanism

Narrow-Complex Tachycardia

  • Sinus Tachycardia (see [[Sinus Tachycardia]])
  • Reentrant Tachycardias: AV nodal blocking agents will typically terminate these
    • AV Nodal Reentry Tachycardia (see [[AV Nodal Reentry Tachycardia]])
    • AV Reentry Tachycardia (see [[AV Reentry Tachycardia]])
  • Reentrant Circuit Based in the Atrial Myocardium: AV nodal blocking agents will typically slow these, but not terminate them
    • Atrial Fibrillation (see [[Atrial Fibrillation]])
    • Atrial Flutter (see [[Atrial Flutter]])
    • Atrial Tachycardia (see [[Atrial Tachycardia]])
  • Automatic SVT’s: due to an excited automatic focus (not due to reentry)
    • Ectopic Atrial Tachycardia (see [[Atrial Tachycardia]])
    • Multifocal Atrial Tachycardia (MAT) (see [[Multifocal Atrial Tachycardia]])
    • Junctional Tachycardia: rare in adults

Wide-Complex Tachycardia

Classification by EKG Morphology

Narrow-Complex Tachycardias

  • Regular
    • Sinus Tachycardia
    • SVT -> AV Nodal Reentry Tachycardia (AVNRT)
    • SVT -> AV Reentry Tachycardia (AVRT)
    • Atrial Flutter
    • Atrial Tachycardia:
  • Irregular
    • Atrial Fibrillation (AF)
    • Multifocal Atrial Tachycardia (MAT)
    • Atrial Flutter: occasionally (with variable AV block)

Wide-Complex Tachycardia

  • Regular
    • Ventricular Tachycardia (see [[Ventricular Tachycardia]])
    • SVT with Aberrancy (see [[AV Nodal Reentry Tachycardia]], [[AV Reentry Tachycardia]])
    • Ventricular Paced Rhythms (see [[Pacemakers]])
  • Irregular
    • AF with Aberrancy (see [[Atrial Fibrillation]])
    • Ventricular Fibrillation (see [[Ventricular Fibrillation]])
    • Wolff-Parkinson-White Syndrome (see [[Wolff-Parkinson-White Syndrome]])
    • Polymorphic VT/Torsade (see [[Torsade]] and [[Ventricular Tachycardia]])


  • Part 8: Adult Advanced Cardiovascular Life Support : 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. Circulation 2010, 122:S729-S767