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  1. Home
  2. Investigations
  3. Tachyarrhythmias

Tachyarrhythmias

 
 
 
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Fast heart rhythms on an ECG may be caused by supraventricular or ventricular rhythms, some of which are imminently life threatening and require rapid assessment.
 
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***
  • Narrow complexes originate above the AV node, while broad complexes originate from either the ventricle or from above the AV node with aberrant conduction.

Narrow Complex Tachycardia

  • Approach to Narrow Complex Tachycardia

  • Sinus Tachycardia

    Regular narrow complex tachycardia with uniform P waves and PR intervals

  • Focal Atrial Tachycardia

    Regular narrow complex tachycardia with abnormal yet consistent P waves

  • Multifocal Atrial Tachycardia

    Irregular narrow complex tachycardia with multiple P wave morphologies and variable PP intervals

  • Atrial Flutter

    Regular narrow complex tachycardia with sawtooth waves

  • Atrial Fibrillation

    Irregular narrow complex tachycardia with absence of P waves and disorganised atrial activity

  • AV Nodal Reentrant Tachycardia

    Regular narrow complex tachycardia with P waves hidden within QRS

  • AV Reentrant Tachycardia

    Orthodromic or antidromic

    Regular narrow complex tachycardia with P waves visible after QRS (orthodromic)

Wide Complex Tachycardia

  • Approach to wide complex tachycardia

  • Ventricular Tachycardia

    Regular tachycardia with broad QRS

  • SVT with Aberrancy or Preexcitation

    Regular tachycardia with broad QRS complexes

  • AF with Aberrancy or Preexcitation

    Irregular tachycardia with broad QRS complexes

Other

  • Ventricular Fibrillation

    Chaotic electrical activity without PQRST

On this page: Narrow Complex TachycardiaWide Complex TachycardiaOther
 
   

 

Read More...

 Cosío FG. Atrial Flutter, Typical and Atypical: A Review. Arrhythmia & electrophysiology review. 2017 Jun;6(2):55. Falk RH. Atrial Fibrillation. New England Journal of Medicine. 2001 Apr 5; 344: 1067-1078. Katritsis DG, Zareba W, Camm AJ. Nonsustained ventricular tachycardia. Journal of the American College of Cardiology. 2012 Nov 13;60(20):1993-2004. Kistler PM, Roberts-Thomson KC, Haqqani HM, Fynn SP, Singarayar S, Vohra JK, Morton JB, Sparks PB, Kalman JM. P-wave morphology in focal atrial tachycardia: development of an algorithm to predict the anatomic site of origin. Journal of the American College of Cardiology. 2006 Sep 5;48(5):1010-7. Pava LF, Perafán P, Badiel M, Arango JJ, Mont L, Morillo CA, Brugada J. R-wave peak time at DII: a new criterion for differentiating between wide complex QRS tachycardias. Heart rhythm. 2010 Jul 1;7(7):922-6. Roberts-Thompson KC, Kistler PM, Kalman JM. Focal atrial tachycardia I: clinical features, diagnosis, mechanisms, and anatomic location. Pacing and clinical electrophysiology. 2006 Jun;29(6):643-52. Rosso R, Kistler PM. Focal atrial tachycardia. Heart. 2010 Feb 1;96(3):181-5. Schoonderwoerd BA, Smit MD, Pen L, Van Gelder IC. New risk factors for atrial fibrillation: causes of not-so-lone atrial fibrillation. Europace. 2008 Jun 1;10(6):668-73.
 
 
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