cyanotic congenital heart disease

Cyanotic congenital heart disease is a type of congenital heart disease present at birth, characterized by a bluish discoloration of the skin. This occurs when a shunt bypasses the lungs, allowing deoxygenated blood from the right side of the heart to enter the arterial circulation.1

Key features include:
* Mixing of blood: Oxygenated and deoxygenated blood mix, leading to insufficient oxygen in the body's tissues.2
* Causes: While some cases have genetic links or are associated with chromosomal abnormalities like Down syndrome, others stem from environmental factors during pregnancy, such as viral infections (e.g., rubella) or certain medications.1
* Specific defects: Conditions like Tetralogy of Fallot, which involves a ventricular septal defect, pulmonary stenosis, an overriding aorta, and right ventricular hypertrophy, are examples of cyanotic heart disease.34
* Treatment: Surgical repair is often possible, with early interventions transforming the outlook for affected infants.5