Pulmonary Flow Modulation With Diabolo Stent Technique Over the Subpulmonary Outflow Tract.

The diabolo stent technique enables the controlled dilation of stenosis, improving blood flow while avoiding hyperflow. In our case, it was successfully applied to a young girl with a single-ventricle heart. This approach offers a valuable alternative to surgical treatment.

A word of caution: diabolic behaviour of AndraStents®: inflation of supporting balloon leads to "diabolo"-misconfiguration of the stent.

Aims: Transcatheter implantation of pulmonary balloon-expandable stent-valves requires pre-stenting of the right ventricular outflow tract with large calibre stents. To increase awareness of the associated risks of this part of transcatheter pulmonary valve replacement therapy, we report potential fatal complications during the implantation of AndraStents® in the right ventricular outflow tract in six cases from five different European institutions and their management.

Method And Result: We present a retrospective case series analysis looking at the time period from 2013 to 2018.