Congestive Heart Failure (CHF) refers to a condition where the heart is unable to pump blood effectively, causing fluid buildup in the body. In children, this can result in symptoms such as fatigue, shortness of breath, and swelling in the legs and ankles. CHF can be caused by various underlying conditions, including heart defects present at birth, heart muscle damage, or infections. Early diagnosis and treatment are essential to manage CHF and prevent progression of the condition.