CARDIO: Obstructive Defects (coarctation of the aorta)
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COARCTATION OF THE AORTA:
localized narrowing near the insertion of ductus arteriosus.
BP is higher in the upper ext than the lower ext, bounding pulses in the arms, and cool lower ext(+)signs of HF (infants and decreased CO)children: headache, dizziness, fainting, episode of epistaxis resulting from hypertension
balloon angioplasty in children (restenosis can occur)
- mech-vent and medications to improve CO is necessary before surgery
- resection of the coarcted portion with end-to-end anastomosis of the aorta or enlargement of the constricted section, using a graft
- cardiopulmonary bypass in not required bec the defect is outside the heart, a thoracotomy incision is used
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