What is one of the initial signs of congenital heart defects in infants?

Cyanosis, or a bluish coloring of the skin, is a significant initial sign of congenital heart defects in infants. This occurs due to the inadequate oxygenation of blood, which can be a result of structural abnormalities in the heart that impede normal blood flow. Infants with congenital heart defects may have difficulties oxygenating their blood effectively, leading to a noticeable bluish tint on their skin, particularly in the lips, fingers, and toes. Identifying cyanosis promptly is critical for early intervention and management of potential complications related to heart defects.

Other signs and symptoms may manifest later or may not be as apparent as cyanosis. For instance, while rapid growth is typically seen in healthy infants, excessive crying and increased appetite can be influenced by various factors including hunger or discomfort, and they may not specifically indicate a heart defect. Thus, cyanosis serves as a more definitive and urgent indicator warranting further evaluation.