Which description best fits coarctation of the aorta in a child?

Which description best fits coarctation of the aorta in a child?

• A. Machinery-like murmur
• B. Systolic ejection murmur at the left infraclavicular region radiating to the back
• C. Harsh holosystolic murmur at the left lower sternal border
• D. Continuous murmur

Answer: (B)

A key clinical clue for coarctation is turbulent flow across a narrowed aorta that shows up as a systolic murmur. This murmur is best heard high on the left side of the chest (left infraclavicular/left chest region) and often radiates to the back, reflecting the abnormal flow along the aortic arch and descending aorta during systole when the ventricle is actively ejecting. It’s a systolic ejection type because the obstruction limits flow primarily during ejection, not throughout the whole cardiac cycle. This pattern helps distinguish it from other common pediatric murmurs. A machinery-like murmur indicates a patent ductus arteriosus, which is continuous rather than just systolic. A harsh holosystolic murmur at the left lower sternal border points to a ventricular septal defect or related regurgitation, which has a different location and timing. A truly continuous murmur can also be seen with PDA, not coarctation. In real practice, you’d also look for signs like higher blood pressure in the arms compared with the legs and weak or delayed femoral pulses, which support the diagnosis of coarctation alongside the characteristic murmur.

A key clinical clue for coarctation is turbulent flow across a narrowed aorta that shows up as a systolic murmur. This murmur is best heard high on the left side of the chest (left infraclavicular/left chest region) and often radiates to the back, reflecting the abnormal flow along the aortic arch and descending aorta during systole when the ventricle is actively ejecting. It’s a systolic ejection type because the obstruction limits flow primarily during ejection, not throughout the whole cardiac cycle.

This pattern helps distinguish it from other common pediatric murmurs. A machinery-like murmur indicates a patent ductus arteriosus, which is continuous rather than just systolic. A harsh holosystolic murmur at the left lower sternal border points to a ventricular septal defect or related regurgitation, which has a different location and timing. A truly continuous murmur can also be seen with PDA, not coarctation.

In real practice, you’d also look for signs like higher blood pressure in the arms compared with the legs and weak or delayed femoral pulses, which support the diagnosis of coarctation alongside the characteristic murmur.