Abstract
A detailed analysis of the ventricular activation along the posterior aspect of the mitral annulus was made using a multipolar catheter positioned in the coronary sinus in a patient with mitral isthmus ventricular tachycardia (VT) associated with a remote inferior myocardial infarction and prior cryosurgical ablation for the elimination of a different preexisting VT. A change in the timing and sequence of the ventricular activation along the isthmus could be observed during induction of the VT and entrainment pacing. A radiofrequency (RF) current application directed at the posterolateral region of the isthmus successfully eliminated this tachycardia. During the RF delivery, complete conduction block was confirmed by a sudden change in the activation sequence during sinus rhythm.
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Hayashi, M., Kobayashi, Y., Miyauchi, Y. et al. Analysis of Posterior Mitral Annular Activation During Entrainment and Catheter Ablation of Mitral Isthmus Ventricular Tachycardia Using a Coronary Sinus Catheter. J Interv Card Electrophysiol 4, 427–434 (2000). https://doi.org/10.1023/A:1009862702673
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DOI: https://doi.org/10.1023/A:1009862702673