Why the study?
Can radiofrequency catheter ablation successfully treat idiopathic left ventricular tachycardia exhibiting LBBB morphology?
Can radiofrequency catheter ablation successfully treat idiopathic left ventricular tachycardia exhibiting LBBB morphology?
Radiofrequency catheter ablation can successfully treat rare cases of idiopathic left ventricular tachycardia exhibiting LBBB morphology when applied to the LV upper septum.
May inform ablation site selection in rare idiopathic LV VT with LBBB; leaves open generalizability and safety in larger cohorts.
Idiopathic left ventricular (LV) tachycardia usually exhibits right bundle branch block morphology. There are only a few sporadic cases that exhibit left bundle branch block (LBBB) morphology. We report a patient whose QRS complex during ventricular tachycardia (VT) was relatively narrow (100 msec) and exhibited LBBB (precordial R wave transition between V3 and V4) and a normal frontal plane axis. This VT was ablated successfully by radiofrequency current applied to the LV upper septum, where the earliest endocardial activation was recorded.
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Shimoike et al. (2000) studied this question.
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