A natural systemic to pulmonary artery shunt

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiology
• Congenital Heart Disease

Background:

• Isolation of the left subclavian artery is a rare anomaly, often linked with a right aortic arch.
• Tetralogy of Fallot (TOF) is a complex congenital heart defect requiring surgical intervention.
• Aberrant subclavian arteries can have significant clinical implications.

Purpose of the Study:

• To report a unique case of an isolated left subclavian artery supplying pulmonary circulation in a patient with TOF.
• To describe the successful surgical management of this complex anatomical variation.
• To highlight the role of this anomaly as a natural systemic-to-pulmonary shunt.

Main Methods:

• Case report detailing a patient with TOF and an aberrant left subclavian artery.
• Pre-operative assessment including evaluation for associated symptoms.
• Surgical intervention involving total correction of TOF and ligation of the aberrant artery.

Main Results:

• The aberrant left subclavian artery provided a functional systemic-to-pulmonary artery shunt, maintaining adequate oxygenation.
• The patient exhibited good room air saturation without signs of vertebrobasilar insufficiency or limb ischemia.
• Successful total correction of TOF and ligation of the aberrant artery were achieved.

Conclusions:

• An isolated left subclavian artery can act as a natural palliative shunt in TOF.
• Surgical correction of TOF is feasible and effective even with this rare anomaly.
• Careful pre-operative assessment is crucial for managing such complex congenital heart conditions.