title: Sustained monomorphic ventricular tachycardia: a single electrocardiographic expression of different patterns of reentry.
abstract: Sustained monomorphic ventricular tachycardia (SMVT) can be the electrocardiographic expression of a reentrant impulse in the ventricles. In this study we analyzed the different types of reentry that might lead to SMVT.
  
  
  METHODS
  The pattern of activation of 73 episodes of SMVT induced in thin sheets of epicardium in 50 Langendorff perfused rabbit hearts were visualized with high resolution epicardial mapping (248 points).
  
  
  RESULTS
  Five different patterns of reentry resulting in SMVT were identified: (1) Single-loop reentry around a fixed obstacle (n = 40); (2) Single-loop reentry around a functional arc of conduction block (n = 17); (3) Double-wave reentry around a fixed obstacle (n = 9); (4) Figure-of-eight reentry around two areas of functional block (n = 5); and (5) Multiple synchronized circuits around multiple areas of functional block (n = 2).
  
  
  CONCLUSIONS
  SMVT is a single electrocardiographic expression of different patterns of reentry. Accurate mapping is mandatory to identify the reentrant pathway and the pathophysiological substrate of the arrhythmia.
authors.affiliation: Department of Physiology, University of Limburg, Maastricht, The Netherlands.
authors.forename: J
authors.initials: J
authors.lastname: Brugada
authors.forename: L
authors.initials: L
authors.lastname: Boersma
authors.forename: C
authors.initials: C
authors.lastname: Kirchhof
authors.forename: Z
authors.initials: Z
authors.lastname: Zetelaki
authors.forename: H
authors.initials: H
authors.lastname: Abdollah
authors.forename: K
authors.initials: K
authors.lastname: Konings
authors.forename: M
authors.initials: M
authors.lastname: Allessie
mesh_terms: D000818:Animals; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D008297:Male; D011817:Rabbits; D013610:Tachycardia / Q000175:diagnosis* / Q000503:physiopathology