In this section
Emergency Drug &
Cyanotic spells occur in children with cyanotic congenital heart
disease, in particular tetralogy of Fallot and pulmonary atresia.
They usually occur early in the morning, or in the context of
stress or dehydration ie periods of increased oxygen
demand/ultilisation. The pathophysiology is not fully understood,
but relates to decreased pulmonary blood flow.
Most episodes are self limiting.