Characteristics of systolic and diastolic potentials recorded in the left interventricular septum in verapamil-sensitive left ventricular tachycardia

Cardiol J. 2012;19(4):418-23. doi: 10.5603/cj.2012.0075.

Abstract

We studied the electrophysiological characteristics of systolic (SP) and diastolic (DP) potentials recorded during sinus rhythm (SR) in the left interventricular septum of a 27 year-old woman presenting with verapamil-sensitive idiopathic left ventricular tachycardia (VT). During SR, and during VT, SP was activated from ventricular base-to-apex, and DP from apex-to-base. SP and DP were both detected at the site of successful ablation during SR, whereas during VT, DP was detected away from the earliest activation site. Thus, SP apparently reflected a critical component of the reentrant circuit, while DP reflected the activation of a bystander pathway.

Publication types

  • Case Reports

MeSH terms

  • Action Potentials / drug effects*
  • Adult
  • Anti-Arrhythmia Agents / administration & dosage*
  • Bystander Effect
  • Catheter Ablation
  • Diastole / drug effects
  • Electrophysiologic Techniques, Cardiac
  • Female
  • Humans
  • Injections, Intravenous
  • Radiography, Interventional
  • Systole / drug effects
  • Tachycardia, Ventricular / diagnosis
  • Tachycardia, Ventricular / drug therapy*
  • Tachycardia, Ventricular / physiopathology
  • Tachycardia, Ventricular / surgery
  • Time Factors
  • Treatment Outcome
  • Ventricular Function, Left / drug effects*
  • Ventricular Septum / drug effects*
  • Ventricular Septum / physiopathology
  • Ventricular Septum / surgery
  • Verapamil / administration & dosage*

Substances

  • Anti-Arrhythmia Agents
  • Verapamil