Narrowing or constriction of the descending aorta, often near the ductus arteriosus or left subclavian artery. Obstructs systemic blood outflow. Causes the heart to wrk harder to pump blood throughout the narrowed aorta, therefore blood pressure increases in the left ventricle. May cause the left ventricle to hypertrophy.
Clinical Manifestations: can be asymptomatic, moderate, or severe. Moderate: poor feeding, FTT, increased respiratory effort, CHF. Severe: cyanosis in lower extremities, HF, shock
Interventions: surgery, prostaglandin to reopen ductus arteriosus and promote blood flow to the lower extremities, diuretics, digoxin, dobutamine.
Pulses high in the upper body and low in the lower body