Registered Nurse Certified in Maternal Newborn Nursing (RNC-MNN) Practice Test

What might be an indication of a developing heart defect in a newborn?

1. Unequal movement of limbs

2. Normal respiratory rate

3. Absence of abnormal reflexes

4. Presence of a strong cry

The correct answer is: Unequal movement of limbs

Unequal movement of limbs in a newborn could indicate a developing heart defect due to the potential impact of poor circulation or oxygenation on overall muscle function and movement. When a newborn has a cardiac issue, it may lead to inadequate blood flow to certain areas of the body, which can manifest as asymmetrical movement. This suggests that the body is not receiving sufficient oxygen, affecting the function of the limbs. In contrast, a normal respiratory rate may suggest that the infant is currently managing to breathe adequately despite underlying heart issues, but it does not provide clear evidence of a heart defect. Similarly, the absence of abnormal reflexes typically indicates that the neurological status is intact and does not specifically signal a heart defect. A strong cry usually reflects good respiratory function and is often a positive sign of a well-functioning heart and lungs, making it less likely to indicate a heart defect. Understanding these nuances helps in recognizing the various signs and symptoms that may indicate cardiac issues in newborns, reinforcing the importance of careful physical assessment in neonatal care.