This document discusses congenital heart disease (CHD), which occurs when the heart fails to develop normally before birth. CHD is classified as cyanotic or acyanotic, depending on whether oxygen levels are low. Common types of CHD include ventricular septal defect, atrial septal defect, tetralogy of Fallot, and transposition of the great arteries. Symptoms vary depending on the type of defect but may include feeding problems, fatigue, poor growth, and infections. Diagnosis involves tests like echocardiograms and chest x-rays. Treatment options include medication, surgery to repair or palliate defects, and lifestyle management to support general well-being.