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What Is the Arterial Switch Operation?

The arterial switch operation is open-heart surgery that corrects dextro-transposition of the great arteries by reconnecting the aorta and pulmonary artery to the appropriate ventricles. It is the standard anatomical repair for most newborns with this congenital heart defect. The coronary arteries are transferred to the new aorta so the heart muscle continues to receive oxygen-rich blood. The operation restores the normal series circulation in which blood flows from the body to the lungs, then from the lungs back to the body.

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What Is the Arterial Switch Operation?

The arterial switch operation is open-heart surgery that corrects dextro-transposition of the great arteries by reconnecting the aorta and pulmonary artery to the appropriate ventricles. It is the standard anatomical repair for most newborns with this congenital heart defect. The coronary arteries are transferred to the new aorta so the heart muscle continues to receive oxygen-rich blood. The operation restores the normal series circulation in which blood flows from the body to the lungs, then from the lungs back to the body.

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Why Is the Arterial Switch Operation Performed?

The procedure is performed for newborns with dextro-transposition of the great arteries, in which the aorta arises from the right ventricle and the pulmonary artery arises from the left ventricle. This arrangement creates two parallel circulations and cannot support normal oxygen delivery without enough mixing between them. Prostaglandin infusion and balloon atrial septostomy can be used before surgery when additional mixing is needed. The arterial switch is usually performed in the neonatal period, although the exact timing and associated repairs depend on ventricular septal defects, aortic-arch abnormalities, coronary anatomy, and the infant's condition.

How Is the Arterial Switch Operation Performed?

The operation is performed through a median sternotomy with cardiopulmonary bypass. The surgeon divides the aorta and pulmonary artery above their valves and reconnects them to the opposite roots so the left ventricle ejects into the aorta and the right ventricle ejects into the pulmonary artery. The coronary arteries are excised as small buttons from the original aortic root and reimplanted into the new aorta. A LeCompte maneuver is commonly used to position the pulmonary arteries in front of the aorta, and any ventricular septal or arch defect can be repaired during the same operation.

What Is Recovery Like After the Arterial Switch Operation?

Newborns recover in a cardiac intensive-care unit with close monitoring of heart function, oxygen levels, blood pressure, rhythm, ventilation, and coronary perfusion. Temporary medications can support the heart and blood pressure while the circulation adapts after bypass. Feeding and activity are advanced as breathing, cardiac output, and wound healing improve. Lifelong congenital-cardiology follow-up is required because coronary arteries, the reconstructed great vessels, heart valves, and ventricular function can develop late problems.

What Are the Risks and Complications?

Early complications can include bleeding, arrhythmias, low cardiac output, infection, neurologic injury, or difficulty separating from cardiopulmonary bypass. Coronary-artery problems are particularly serious because the coronary vessels must be transferred during the operation. Long-term concerns include coronary narrowing, pulmonary-artery stenosis, dilation of the neo-aortic root, and neo-aortic valve regurgitation. Most children now have excellent long-term survival, but periodic imaging and lifelong congenital-heart follow-up remain necessary.

Frequently Asked Questions About the Arterial Switch Operation

What heart defect is treated with the arterial switch operation?

The operation is primarily used for dextro-transposition of the great arteries, commonly called d-TGA.

Why are the coronary arteries moved during the operation?

The original pulmonary root becomes the new aorta after the switch, so the coronary arteries must be transferred to it to continue supplying the heart muscle.

When is the arterial switch operation usually performed?

It is usually performed during the neonatal period, often within the first days or weeks of life, depending on anatomy and the infant's clinical condition.

Is lifelong follow-up needed after an arterial switch?

Yes. Patients need lifelong congenital-heart care because coronary, pulmonary-artery, neo-aortic valve, and neo-aortic root complications can develop years later.

References

Arterial Switch Procedure. Cleveland Clinic. https://my.clevelandclinic.org/health/procedures/arterial-switch-procedure. Date Accessed September 11, 2026.

2025 ACC/AHA/HRS/ISACHD/SCAI Guideline for the Management of Adults With Congenital Heart Disease: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Journal of the American College of Cardiology. https://www.jacc.org/doi/10.1016/j.jacc.2025.09.006. Date Accessed September 11, 2026.

Neoaortic outcomes after the arterial switch operation: A systematic review and meta-analysis. PubMed. https://pubmed.ncbi.nlm.nih.gov/41193284/. Date Accessed September 11, 2026.

Long-Term Coronary Artery Complications Following the Arterial Switch Operation for Transposition of the Great Arteries-A Scoping Review. PubMed. https://pubmed.ncbi.nlm.nih.gov/39911102/. Date Accessed September 11, 2026.

Long-term outcome after the arterial switch operation: 43 years of experience. PubMed. https://pubmed.ncbi.nlm.nih.gov/33942860/. Date Accessed September 11, 2026.