Abstract
WHEN Dr. Blalock and Dr. Taussig first introduced their operation for cyanotic patients with certain types of congenital malformation of the heart, they advised 1 the postponement of the operation, whenever possible, until the patient is more than 2 years of age and its performance before puberty. It was also stated that... not only is the operation technically more difficult in infants but even if successful it is still uncertain whether the vessel anastomosed will increase sufficiently in size as the infant grows to maintain adequate circulation to the lungs. 1 The operation introduced by Potts, Smith and Gibson 2 eliminated some of the objections raised by Blalock and Taussig, since neither the innominate nor the subclavian artery is used, and one is not, therefore, concerned with the caliber of these vessels. The youngest infant ever operated on by anyone to our knowledge was 4 months of age. 3 It
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