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Unsynchronized Cardioversion (Defibrillation)

  • Matthew R. Tice
  • Zachary B. Kramer
  • Marie-Carmelle Elie

Abstract

Unsynchronized cardioversion or defibrillation is the delivery of a high-energy shock as soon as the button is pushed on defibrillator. This means it can be delivered anywhere in the cardiac cycle. By contrast, synchronized cardioversion (see Chap.  29) delivers a low-energy shock at the peak of the R wave in the cardiac (QRS) cycle.

Keywords

Pulseless ventricular tachycardia Ventricular fibrillation Unsynchronized cardioversion 

Selected Reading

  1. Advance cardiovascular life support: provider manual. Dallas: American Heart Association; 2011.Google Scholar
  2. Deakin CD, Sado DM, Petley GW, Clewlow F. Is the orientation of the apical defibrillation paddle of importance during manual external defibrillation? Resuscitation. 2003;56:15–8.CrossRefPubMedGoogle Scholar
  3. Pagan-Carlo LA, Spencer KT, Robertson CE, Dengler A, Birkitt C, Kerber RE. Transthoracic defibrillation: importance of avoiding electrode placement directly on the female breast. J Am Coll Cardiol. 1996;27:449–52.CrossRefPubMedGoogle Scholar
  4. Walker C, Callies F, Langenfeld H. Adverse effects of direct current cardioversion on cardiac pacemakers and electrodes: is external cardioversion contraindicated in patients with permanent pacing systems? Eur Soc Cardiol. 2004;6:165–8.Google Scholar

Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Matthew R. Tice
    • 1
  • Zachary B. Kramer
    • 1
  • Marie-Carmelle Elie
    • 1
  1. 1.Department of Emergency MedicineUniversity of FloridaGainesvilleUSA

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