P392Extensive scar de-channelization in the atria, an alternative for the treatment of intra-atrial re-entrant tachycardia in patients after congenital heart surgery. (20th June 2017) - Hendriks, AA.; Kis, Z.; Akca, F.; Yap, SC.; Wijchers, SA.; Bhagwandien, RE.; Szili-Torok, T.