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Paroxysmal hypercyanotic spells

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Paroxysmal hypercyanotic attacks are a features of tetralogy of Fallot, and are a particular problem in the first two years of life.

They are a potential emergency in the child with Fallot's, and the parents should be made aware of the potential for this to happen so that appropriate management is prompt.

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