CAMILLO (Varese , Italy), one of the association Shelter for Stray had serious episodes of cyanosis after minimal effort . Echocardiography showed a complex congenital condition called tetralogy of Fallot . At the Veterinary Clinic Malpensa , with the help of the Committee for the Otto Foundation, it was possible to make a heart surgery (arteriovenous anastomoses – Blalock – Taussig technique modified) to increase blood oxygenation . At 48 hours after surgery , CAMILLO was discharged in good clinical condition.