This week we delve into the world of interventional cardiology and the Fontan when we review a recent report from the Children's Hospital of Philadelphia on the use of the "MitraClip" for the treatment of AV valve regurgitation in the congenital heart patient. Who would be a good candidate for this novel approach? What are the steps in planning or consideration of this technique in a congenital heart patient? How durable is this form of repair? These are amongst the many questions reviewed this week with this week's senior author, Professor of Pediatrics at the Children's Hospital of Philadelphia, Dr. Matthew J. Gillespie.  DOI: 10.1002/ccd.30935