EKG

Atrial Tachycardia

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Atrial Tachycardia, Multifocal Atrial Tachycardia

  • See Also
  1. Supraventricular Tachycardia
  2. Atrioventricular Nodal Reentry (AVNRT)
  3. Atrioventricular Reciprocating Tachycardia (AVRT)
  4. Atrial Tachycardia
  5. Unstable Tachycardia
  6. Sinus Tachycardia
  7. Atrial Fibrillation
  8. Unstable Tachycardia
  9. Narrow Complex Tachycardia
  10. Wide Complex Tachycardia
  11. Cardiopulmonary Resuscitation
  12. Supraventricular Tachycardia Management in the Child
  13. Supraventricular Tachycardia Management in the Adult
  • Definition
  1. Form of Supraventricular Tachycardia (10% of cases) with increased automaticity
  • Pathophysiology
  1. Abnormal focus of atrial automaticity (outside the SA node)
  2. Unlike AVNRT and AVRT, no accessory pathway is involved
  1. Heart Rate 130 to 180 (up to 250)
  • Types
  1. Atrial Tachycardia
    1. Focal
    2. Macroentrant
  2. Multifocal Atrial Tachycardia
    1. Irregular narrow complex rhythm with 3 or more different P Wave morphologies
  • Causes
  • Multifocal Atrial Tachycardia
  1. Causes: Enlarged atrium
    1. Chronic lung disease
    2. Congestive Heart Failure
  2. Causes: Other
    1. Acid-base disturbance
    2. Electrolyte abnormalities
      1. Hypokalemia
      2. Hypomagnesemia
  • References
  1. Colucci (2010) Am Fam Physician 82(8): 942-52 [PubMed]
  2. Delacretaz (2006) N Engl J Med 354(10): 1039-51 [PubMed]
  3. Helton (2015) Am Fam Physician 92(9): 793-800 [PubMed]
  4. Kumar (2006) Cardiol Clin 24(3): 427-37 [PubMed]