Idiopathic left ventricular tachycardia with a change from left to right axis deviation during radiofrequency
Yasuo Okumura1, Ichiro Watanabe, Kimie Ohkubo
1Division of Cardiovascular Disease, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Abstract:
A 62 year-old-woman presented with a right bundle branch block (RBBB) and left axis deviation (LAD) tachycardia. Radiofrequency (RF) energy was delivered to the left posterior fascicle (LPF) where 2 presystolic Purkinje potentials (P1 and P2) preceding onset of the QRS complex were recorded. During RF energy applications, the QRS morphology of the tachycardia changed from RBBB and LAD to RBBB and right axis deviation without termination of the tachycardia. The Purkinje potential was observed following the QRS complex during the tachycardia because of conduction block of the LPF distal to the reentry circuit due to RF catheter ablation.
More Related Videos
12:45Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
Published on: December 11, 2017
09:13Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
Published on: April 21, 2013
Related Concept Videos
Dysrhythmias III: Characteristics of Dysrhythmias
Disturbances in Heart Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias IV: Characteristics of Bradyarrhythmias
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Mechanism of Cardiac Arrhythmias
Dysrhythmias II: Classification of Tachyarrhythmias
