“…Only about 3% of patients survive to 40 years without surgical correction (Bertranou et ul, 1978;Rygg et al, 1971), and very few cases surviving beyond 60 years of age have been reported in the literature (Bain, 1954;, Bond etal., 1969;Bowie, 1961;Holladay and Witham, 1957;Marquis, 1956;Phadke et al, 1977;Sisel et al, 1971), almost all of whom were of the acyanotic variety. Longevity is generally felt to correlate with favorable anatomy permitting greater pulmonary flow, and milder degrees of arterial desaturation (Abraham et al, 1978).…”