Bipolar Radiofrequency Ablation of Ventricular Arrhythmias Originating in the Vicinity of His Bundle.

When arrhythmia originates from the His bundle (HB) area conventional radiofrequency catheter ablation (RFCA) is associated with increased risk of atrioventricular block (AVB). Biophysics of bipolar RFCA (Bi-RFCA) suggest more selective lesion formation. It has been shown that Bi-RFCA can be an alternative in case of premature ventricular complex (PVC) or ventricular tachycardia (VT) refractory to standard RF. Whether Bi-RFCA can result in safe and effective ablation of PVC/VT originating from the close proximity of HB has not yet been investigated.