Cyanotic heart defect

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A cyanotic heart defect is a group-type of congenital heart defects (CHDs). The patient appears blue (cyanotic), due to deoxygenated blood bypassing the lungs and entering the systemic circulation. This can be caused by right-to-left or bidirectional shunting, or malposition of the great arteries.

Cyanotic heart defects, which account for approximately 25% of all CHDs, include:

• dextro-Transposition of the great arteries (d-TGA)
• Hypoplastic left heart syndrome (HLHS)
• Pulmonary atresia (PA)
• Tetralogy of Fallot (ToF)
• Tricuspid atresia
• Persistent truncus arteriosus

This is an incomplete list, which may never be able to satisfy certain standards for completeness. Revisions and sourced additions are welcome.