The Blalock–Hanlon procedure is a form of heart surgery.
It involves the intentional creation of a septal defect in order to alter the flow of oxygenated blood.
It was described in 1950.
- Catherine A. Neill; Edward B. Clark (28 February 1995). The developing heart: a 'history' of pediatric cardiology. Springer. pp. 61–. ISBN 978-0-7923-3375-3. Retrieved 21 June 2011.
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