What is a typical manifestation of congenital heart defects?

Cyanosis is a typical manifestation of congenital heart defects due to the inadequate oxygenation of blood. In congenital heart defects, structural anomalies in the heart lead to abnormal blood flow patterns, which can result in deoxygenated blood mixing with oxygenated blood. This reduces the overall oxygen saturation in the blood, leading to a bluish discoloration of the skin and mucous membranes, particularly noticeable in the lips and fingertips.

This symptom is especially common in conditions such as tetralogy of Fallot or transposition of the great arteries, where there is significant shunting of blood. Cyanosis serves as a crucial clinical sign, prompting further evaluation and management of the underlying condition. The presence of cyanosis indicates that the body may not be receiving adequate oxygen, which can have serious consequences if not addressed.