Ela, George's is equivalent to a 5 I think with his tetralogy of fallot. He is propanol (spelling), a beta blocker 0.01ml every day and 1/4 20mg aspirin every third day. Was diagnosed at three months, was neutered under guidance from cardiologise at 9 months and is still doing okay at 2 1/2 although we just see every day as a bonus.
He sometimes gets out of breath, sometime has vomiting peaks including a little bit of blood and I have been told that he can be "bled" if his red blood cell count gets too high.