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

Vol 19, No 4 (2012)

Case Reports

Submitted: 2013-01-24

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.

Vol 19, No 4 (2012)

Case Reports

Submitted: 2013-01-24

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.