MRCP UK EXAMINATIONS

Detailed explanation-1: -Infants with tetralogy of Fallot can have a bluish-looking skin color―called cyanosis―because their blood doesn’t carry enough oxygen.

Detailed explanation-2: -Tet spells Sometimes, babies who have tetralogy of Fallot will suddenly develop deep blue skin, nails and lips after crying or feeding, or when agitated. These episodes are called tet spells. Tet spells are caused by a rapid drop in the amount of oxygen in the blood.

Detailed explanation-3: -What are “spells”? Tetralogy of Fallot or hypercyanotic “spells” occur when your child has a quick drop in the amount of oxygen in his or her blood caused by reduced blood flow to the lungs. Spells are most common in young infants, around 2 to 6 months of age, while the infant is awaiting surgery.

Detailed explanation-4: -Cyanotic heart defects include: Tetralogy of Fallot.