Pace Mapping to Localize the Critical Isthmus of Ventricular Tachycardia.
Most postinfarct ventricular tachycardias (VT) are sustained by a reentrant mechanism. The "protected isthmus" of the reentrant circuit is critical for the maintenance of VTs and the target for catheter ablation. In this article, the authors describe the technique of pace-mapping during sinus rhythm to unmask postinfarct VT isthmuses. A pace-mapping map should be considered as the surrogate of an activation map during VT, in both patients with a normal heart and patients with a structural heart disease. Pace mapping is useful to unmask VT isthmuses in patients with postinfarct reentrant VTs.
Department of Cardiology, University Hospital Nancy, rue du Morvan, 54511 Vandœuvre lès-Nancy F-54500, France; INSERM-IADI, U947, rue du Morvan, 54511 Vandœuvre lès-Nancy F-54500, France. Electronic address: c.dechillou@chru-nancy.fr.
Christian
C
de Chillou
Department of Cardiology, University Hospital Nancy, rue du Morvan, 54511 Vandœuvre lès-Nancy F-54500, France; INSERM-IADI, U947, rue du Morvan, 54511 Vandœuvre lès-Nancy F-54500, France.
Jean-Marc
JM
Sellal
Department of Cardiology, University Hospital Nancy, rue du Morvan, 54511 Vandœuvre lès-Nancy F-54500, France; INSERM-IADI, U947, rue du Morvan, 54511 Vandœuvre lès-Nancy F-54500, France.
Isabelle
I
Magnin-Poull
D018780:Body Surface Potential Mapping; D017115:Catheter Ablation; D006801:Humans; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery
Catheter ablation; Electroanatomical mapping; Ischemic cardiomyopathy; Pace-mapping; Ventricular tachycardia