Danny is a Rottweiler male two years old with a severe hypoplastic pulmonary valve stenosis. With the help of the Otto Foundation, Danny underwent at the Veterinary Clinic Malpensa to anballoon valvuloplasty with low and high pressure devices, which unfortunately did not allow to fully solve the obstruction of the right ventricle. In the future thanks to Otto Foundation, Danny will undergo to a right ventriculotomy with the patch-graft technique.