Final answer:
Restenosis of the coarctation should be considered if the upper to lower extremity blood pressure difference is greater than the normal range.
Step-by-step explanation:
Restenosis of the coarctation should be considered if the upper to lower extremity blood pressure difference is greater than the normal range.
A normal pulse pressure falls within the range of 25 percent of the systolic pressure. If the upper to lower extremity blood pressure difference exceeds this range, it indicates a potential problem with the coarctation.
For example, if the upper extremity blood pressure is significantly higher than the lower extremity blood pressure, it suggests that the coarctation has narrowed, leading to increased resistance and decreased blood flow in the lower extremities.