A six-month-old infant has femoral pulses that are weaker than the brachial pulses on palpation. This most likely indicates
a. a physiological brachial-femoral lag that should resolve in 3–4 years.
b. aortic valve stenosis.
c. coarctation of the aorta.
d. a normal finding.
C
One symptom of coarctation of the aorta (COA) is a brachial-femoral lag in which the femoral pulses are weaker than the brachial pulses when palpated simultaneously. COA is the result of a narrowing of the aorta before, at, or just beyond the entrance of the ductus arteriosus. This results in reduced blood flow to the lower body. A brachial-femoral lag is not a normal physiological finding that resolves in 3–4 years. It is always abnormal and does not indicate aortic valve stenosis.
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