Explanation/Reference:
Explanation:
(A) S1 and S2 in an infant with coarctation of the aorta are usually normal. S3 and S4 do not exist with this diagnosis. (B) Either no murmur will be heard or a systolic murmur from an associated cardiac defect will be heard along the left upper sternal border. A diastolic murmur is not associated with coarctation of the aorta. (C) Pulse pressure differences of>20 mm Hg exist between the upper extremities and the lower extremities. It is important to evaluate the upper and lower extremities with the appropriate- sized cuffs. (D) Femoral and pedal pulses will be diminished or absent in infants with coarctation of the aorta.