 This is a much newer treatment for supraventricular tachycardia (SVT) involving the atrioventicular (AV) node directly.SVT involving the AV node is often a contraindication for using radiofrequency ablation because of the risk of injuring the AV node, forcing patients to receive a permanent pacemaker.With cryoablation, areas of tissue can be mapped by limited, reversible, freezing (e.g., to -10 C).