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A narrowing of the lumen below the left subclavian can be one of two types:
a preductal coarctation occurs above the ductus arteriosus, allowing blood to reach the lower body
a postductal coarctation results in obliteration of the ductus and collateral artery formation
Can be in front or behind the ductus arteriousus.
a simple case introducing clincial presentation and calling for a differential diagnosis to get students thinking.
Often associated bicuspid aortic valve.
Diagnose by lack of femoral or brachial pulses.
Radial-femoral delay
Coarctation of the aorta is an EMERGENCY. Once diagnosed, refer to a tertiary care centre immediately.
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