What finding on physical examination could suggest coarctation of the aorta?

Lower extremity pulse weakness is a significant finding that can suggest coarctation of the aorta. In this condition, the aorta is narrowed, usually just distal to the left subclavian artery. This leads to decreased blood flow to the lower body, resulting in weaker pulses in the lower extremities compared to the upper extremities, where blood flow is less affected.

In the case of coarctation, patients may present with various signs, but the classic physical examination finding is the disparity in the strength of pulses between the arms and legs. A weak or absent pulse in the lower extremities is strongly indicative of impeded blood flow due to the obstruction caused by the coarctation.

Understanding this finding is critical in diagnosing coarctation, as it highlights the differential blood flow and aids in the clinical assessment of patients suspected of having this condition. The diagnosis often is supported by imaging studies but recognizing these physical examination findings is essential for timely intervention.