Which among the following is the commonest cause of hea failure in infancy?
**Core Concept**
The question tests the understanding of the common causes of heart failure in infancy, focusing on **congenital heart defects** and their impact on cardiac function. Heart failure in this age group often results from structural abnormalities that lead to inefficient blood circulation.
**Why the Correct Answer is Right**
Although the options are not provided, typically, the most common cause of heart failure in infancy is related to **congenital heart defects**, such as ventricular septal defects, atrial septal defects, and patent ductus arteriosus. These defects can lead to increased workload on the heart, resulting in heart failure.
**Why Each Wrong Option is Incorrect**
**Option A:** Would be incorrect if it suggested an acquired condition or a less common congenital defect.
**Option B:** Might be wrong if it pointed towards a condition not typically associated with infancy or heart failure.
**Option C:** Could be incorrect if it mentioned a rare or non-cardiac cause of heart failure in infants.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **congenital heart defects** are a leading cause of heart failure in infants, and early diagnosis and intervention are crucial for improving outcomes.
**Correct Answer:** D. Congenital heart disease.