Tetralogy of Fallot from http://www.tmc.edu/thi/tetrolog.html: Tetralogy of Fallot is made up of 4 heart defects: * A hole in the wall between the lower chambers (the ventricles), which lets oxygen-poor blood mix with oxygen-rich blood. This is called a ventricular septal defect. * A narrowed outlet to the pulmonary artery, usually along with an abnormal pulmonary valve. This can block blood flow from the lower-right chamber (the right ventricle) into the lungs. * An aorta that straddles the wall (septum) between the lower chambers (the ventricles). This lets oxygen-poor blood flow into the aorta (the main blood supplier to the body). * Thickened and enlarged heart muscle tissue in the lower-right chamber (the right ventricle). So the blood pumped winds up being oxygen depleted. So, this is NOT what I was wondering if it may be: not, not, not. It's interesting; when i was a teen a neighbor boy had this but I never knew the formal name. From the abstract at http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed &list_uids=12551873&dopt=Abstract it appears that Dr. Tony Creazzo is still at the same med school. http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed &list_uids=11413158&dopt=Abstract is a later related article. Ditto: http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed &list_uids=10359559&dopt=Abstract I've run out of time to keep looking at things right now... [Posted in FML issue 4073]