Atrial Septum Perforation Via Levoatriocardinal Vein in a Newborn With Hypoplastic Left Heart Syndrome.

Hypoplastic left heart syndrome with intact atrial septum has high perioperative mortality. An interventional septum perforation from the right atrium may be technically challenging in newborns with high risk of tamponade. However, neonates with a levoatriocardinal vein provide an alternative approach for septostomy from the left atrium side. (Level of Difficulty: Advanced.).