Purkinje-related Arrhythmias

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  • Purkinje‐related Arrhythmias

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The Purkinje system has been found to be responsible for the mechanism of some ventricular tachyarrhythmias. These ventricular tachyarrhythmias can be called Purkinje-related arrhythmias, and are manifested as monomorphic ventricular tachycardia (VT) and polymorphic VT, including ventricular fibrillation (VF). In monomorphic VTs, 4 distinct tachycardias have been found to be related to the Purkinje system: (1) verapamil-sensitive left fascicular VT, (2) Purkinje fiber-mediated VT post infarction, (3) bundle branch reentry (BBR) and interfascicular reentry VTs, and (4) focal Purkinje VT. In polymorphic VT and VF, the Purkinje system may also play an important role. The Purkinje network plays a pivotal role in both the initiation and perpetuation of VF. A triggering ventricular premature beat could arise from either the right or left Purkinje system, and the catheter ablation of the trigger results in a very high cure rate for VF. In patients with an electrical storm, catheter ablation of the triggering VPBs from the Purkinje system should be used as an electrical bailout therapy.

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