open access

Vol 19, No 4 (2012)
Case Reports
Published online: 2012-07-09
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Characteristics of systolic and diastolic potentials recorded in the left interventricular septum in verapamil-sensitive left ventricular tachycardia

Yoshiaki Kaneko, Tadashi Nakajima, Tadanobu Irie, Masaki Ota, Toshimitsu Kato, Takafumi Iijima, Mio Tamura, Hiroaki Kobayashi, Masahiko Kurabayashi
Cardiol J 2012;19(4):418-423.

open access

Vol 19, No 4 (2012)
Case Reports
Published online: 2012-07-09

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.

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.
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Keywords

Purkinje fiber; bystander pathway; essential pathway; catheter ablation; idiopathic ventricular tachycardia

About this article
Title

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

Journal

Cardiology Journal

Issue

Vol 19, No 4 (2012)

Pages

418-423

Published online

2012-07-09

Bibliographic record

Cardiol J 2012;19(4):418-423.

Keywords

Purkinje fiber
bystander pathway
essential pathway
catheter ablation
idiopathic ventricular tachycardia

Authors

Yoshiaki Kaneko
Tadashi Nakajima
Tadanobu Irie
Masaki Ota
Toshimitsu Kato
Takafumi Iijima
Mio Tamura
Hiroaki Kobayashi
Masahiko Kurabayashi

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