Final answer:
Infants with complete heart block have a 30% association with congenital cardiac malformations, often requiring complex treatments and early interventions for improved outcomes.
Step-by-step explanation:
As many as 30% of infants with complete heart block have associated congenital cardiac malformations. The occurrence of congenital heart defects, such as complete heart block, is sometimes associated with other cardiac malformations. Although the overall global average for malformations at birth is around 6%, the association between complete heart block and other congenital defects is notably higher. Conditions like Tetralogy of Fallot, which involves a combination of four congenital heart defects, can often accompany heart block.
This serious cardiac anomaly includes an obstruction of the pulmonary valve, a defect in the interventricular septum, an overriding aorta, and right ventricular hypertrophy. Because such conditions severely affect the heart's ability to efficiently pump oxygenated blood, they necessitate prompt and sophisticated medical interventions ranging from surgical repairs to heart transplants.