P296Cryoablation of premature ventricular complexes arising from the septal region

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Background: With the introduction of catheter technologies into clinical practice, possibility of radical substrate elimination of different arrhythmias has appeared. Radiofrequency ablation (RFA) has shown its high efficiency, however in certain critical zones (in particular - paraseptal) it is associated with a risk of damage to the conduction system. In this regard, endovascular cryoablation, due to its exceptional properties, has become an alternative to RFA in a number of clinical situations. Objective: To evaluate safety and efficiency of cryoablation in patients with premature ventricular complexes (PVCs) of paraseptal localization. Methods: Catheter ablation was performed in 152 patients with PVCs (mean age 43.4±13 years, 80 women) from 2010 to 2015. 122 (80.3%) procedures were performed using the navigation system “CARTO”. In 5 patients (3.3%) the procedure was done with cryoablation. Results: 2 patients from 5 undergoing cryoablation had ectopic substrate in the paraseptal region. In both cases, complete elimination of PVCs was achieved without damage to the conduction system.

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