Abstract
The isolated left subclavian artery is a rare congenital aortic arch anomaly where the left subclavian artery connects to the pulmonary artery via a patent ductus arteriosus or its remnant, rather than the aorta. Typically associated with other congenital heart defects, it can lead to subclavian steal syndrome, pulmonary steal syndrome, and discrepancies in size, blood pressure, or O2saturation between the 2 upper limbs. Our case report describes a 14-month-old infant with an isolated left subclavian artery, multiple ventricular septal defects, and pulmonary hypertension, a rare anomaly impacting surgical planning and outcomes.
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