Open AccessA Case of Radiofrequency Catheter Ablation of Ventricular Tachycardia Associated with an Old Myocardial Infarction Guided by a Noncontact Mapping System
Author(s) -
Miyamoto Koji,
Tsuchiya Takeshi,
Yasuoka Chie,
Tanioka Yoshito
Publication year - 2009
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1016/s1880-4276(09)80032-x
Subject(s) - medicine , cardiology , ventricle , ventricular tachycardia , sinus rhythm , qrs complex , ablation , radiofrequency catheter ablation , catheter ablation , myocardial infarction , tachycardia , atrial fibrillation
We describe here a 72‐year‐old man with ventricular tachycardia (VT) associated with an old myocardial infarction, in whom noncontact mapping guided radiofrequency catheter ablation (RFCA) successfully eliminated the VT. Right ventricular pacing induced 3 VTs with different QRS morphologies and axes, 2 of which were hemodynamically unstable. A dynamic virtual activation map constructed during the VTs superimposed on a virtual voltage map constructed during sinus rhythm demonstrated that all VTs shared a single large myocardial scar in the inferolateral portion of the left ventricle which served as a slow conduction zone. All VTs were eliminated by RFCA at the exit or within the critical slow conduction zone. The patient has been free from any VT recurrences during a follow‐up period of 22 months.