What is indicated when the lower extremities' systolic blood pressure is greater than that of the upper extremities in children?

When the systolic blood pressure in the lower extremities is greater than in the upper extremities in children, it typically indicates coarctation of the aorta. This condition is characterized by a narrowing of the aorta, which can lead to differential blood flow and pressure readings between the upper and lower parts of the body.

In coarctation of the aorta, the upper body, including the arms and head, receives normal or increased blood flow, while the lower body may have limited flow due to the obstruction in the aorta. Consequently, this situation results in higher blood pressures in the lower extremities compared to the upper extremities.

Awareness of this vital sign is important as it can help clinicians identify potential cardiovascular anomalies early and initiate further evaluation or treatment.