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Transient right bundle branch block causing R wave attenuation postdefibrillation.

Abstract
Transient and significant decrease in R wave amplitude, associated with transient right bundle branch block, was noted to occur after defibrillation in a defibrillator patient. The mechanism is probably stunning of the right bundle branch, causing right intraventricular conduction delay and decrease in signal amplitude reaching the endocardial sensing dipoles.
AuthorsR M Kam, H Garan, B A McGovern, J N Ruskin, J W Harthorne
JournalPacing and clinical electrophysiology : PACE (Pacing Clin Electrophysiol) Vol. 20 Issue 1 Pt 1 Pg. 130-1 (Jan 1997) ISSN: 0147-8389 [Print] United States
PMID9121959 (Publication Type: Case Reports, Journal Article)
Topics
  • Bundle-Branch Block (etiology, physiopathology)
  • Defibrillators, Implantable
  • Electric Countershock
  • Electrocardiography
  • Endocardium (innervation)
  • Heart Conduction System (physiopathology)
  • Humans
  • Male
  • Middle Aged
  • Neural Conduction
  • Ventricular Fibrillation (therapy)
  • Ventricular Function, Right

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