Creation of atrial communication was performed in a newborn with critical a
ortic stenosis. After the success of the initial creation, balloon atrial s
eptostomy using Z-5 catheter was performed, When catheter was pulled back,
the tip of the balloon was tom oft. This experience could be considered as
noteworthy when using this catheter in patients with unusually thick atrial
septum. (C) 2001 Wiley-Liss, Inc.