Chief - Paediatric Cardio Thoracic and Vascular Surgery (CTVS), Artemis Hospitals, Gurgaon, India
Part 11 of 14 in Correct Timing for Congenital Heart Surgery
Transposition of the Great Arteries (TGA): Why Timing Is a Matter of Days
August 6, 2026
Transposition of the great arteries without a ventricular septal defect must be corrected with an arterial switch operation before 2 weeks of age, since the left ventricle weakens rapidly after this point and survival without treatment falls to just 4 percent by one year.
What transposition of the great arteries is
In transposition of the great arteries, or TGA, the pulmonary artery arises from the left ventricle and the aorta arises from the right ventricle, the reverse of normal anatomy, leaving children profoundly cyanotic from birth.
TGA without a VSD: an urgent condition
When TGA occurs without a ventricular septal defect, survival without treatment is extremely poor: around 20 percent mortality by one week of age, 80 percent mortality by around 2 months, and only 4 percent of children alive by one year, with hypoxia as the usual cause of death. Treatment, an arterial switch operation, is highly effective, giving around 95 percent survival at one year when performed in time.
Why timing is measured in days, not months
The arterial switch operation for TGA without a VSD should be performed before 2 weeks of age. It can be delayed to 4 to 6 weeks in some cases, but beyond this window the left ventricle, no longer pumping against the higher pressure of the body's circulation, regresses and weakens, making it unable to tolerate the arterial switch operation without additional preparation.
TGA with a VSD: a slightly wider window
When TGA occurs together with a VSD, early survival is somewhat better, but pulmonary artery pressure rises over time and these children can become inoperable if surgery is delayed, with heart failure becoming the main cause of death. The recommended timing for an arterial switch operation with VSD closure in this group is 4 to 8 weeks of life, reflecting the same urgency that governs congenital heart surgery for TGA more broadly.
← Total Anomalous Pulmonary Venous Return (TAPVR): Why Surgery Cannot Wait | Series index | Patent Ductus Arteriosus (PDA): When to Close and How →
This article is based on a Jivo Masterclass session conducted by Dr. Aseem R. Srivastava, Chief, Paediatric CTVS and Adult Congenital Heart Diseases, Artemis Hospitals, Gurgaon, India. The article has been summarised with the assistance of an AI tool from the original masterclass recording. Watch the full Masterclass recording
This guide is based on a live Jivo Masterclass — Dr. Aseem R. Srivastava taught doctors across Africa on August 31, 2025.
FROM THE LIVE Q&A
Dr. Aoke (Ethiopia)
What is the correct timing for a patient with transposition of the great arteries (TGA), VSD, and LVOT obstruction? Also, since we live in a resource-limited country where diagnosis is sometimes made late, and patients may then ask for treatment abroad after a late diagnosis, what is your recommendation for handling late presenters, especially with simple shunt lesions?
Dr. Aseem R. Srivastava
For TGA with VSD and LVOT obstruction, these kids essentially have pulmonary stenosis with a VSD, and timing depends on the kid's oxygen saturation — they will need a Rastelli or a Nikaidoh operation, both requiring an implant, and the intent is to give the biggest implant possible since a smaller implant means an earlier return for a change. If saturations are above 75% and the kid is growing and doing well, they can wait and have surgery at around one year of age; if saturations are less than 75% with significant failure to thrive, they should come for surgery at any age or weight. On late presenters: we are also a resource-limited country — four or five surgeons doing this work for half of India — and face the same problem of kids coming late every day. My suggestion is education programmes, including pulse oximeter screening at birth, 1 month, and 6 months, referring for an echo early if abnormal. Late-presenting PDAs and cyanotic conditions apart from TGA are usually still operable, even if at slightly higher risk, but VSD shunt lesions can become inoperable if too late — however, even when a kid looks clinically inoperable, we always offer a cardiac catheterisation to confirm, since a significant proportion will still turn out to be operable, if high risk. And even an inoperable VSD child, with good, appropriately timed medical management (diuretics, pulmonary vasodilators), can still survive 25–35 years, whereas without that care they will die much earlier.
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Frequently Asked Questions
What is the average cost of ASD closure?▼
Approximately 5,500 USD.
What is the correct timing for a patient with transposition of the great arteries (TGA), VSD, and LVOT obstruction? Also, since we live in a resource-limited country where diagnosis is sometimes made late, and patients may then ask for treatment abroad after a late diagnosis, what is your recommendation for handling late presenters, especially with simple shunt lesions?▼
For TGA with VSD and LVOT obstruction, these kids essentially have pulmonary stenosis with a VSD, and timing depends on the kid's oxygen saturation — they will need a Rastelli or a Nikaidoh operation, both requiring an implant, and the intent is to give the biggest implant possible since a smaller implant means an earlier return for a change. If saturations are above 75% and the kid is growing and doing well, they can wait and have surgery at around one year of age; if saturations are less than 75% with significant failure to thrive, they should come for surgery at any age or weight. On late presenters: we are also a resource-limited country — four or five surgeons doing this work for half of India — and face the same problem of kids coming late every day. My suggestion is education programmes, including pulse oximeter screening at birth, 1 month, and 6 months, referring for an echo early if abnormal. Late-presenting PDAs and cyanotic conditions apart from TGA are usually still operable, even if at slightly higher risk, but VSD shunt lesions can become inoperable if too late — however, even when a kid looks clinically inoperable, we always offer a cardiac catheterisation to confirm, since a significant proportion will still turn out to be operable, if high risk. And even an inoperable VSD child, with good, appropriately timed medical management (diuretics, pulmonary vasodilators), can still survive 25–35 years, whereas without that care they will die much earlier.
How soon should transposition of the great arteries without a VSD be corrected?▼
Before 2 weeks of age with an arterial switch operation. It can be delayed to 4 to 6 weeks in some cases, but beyond this window the left ventricle regresses and weakens.
What happens without treatment for TGA without a VSD?▼
Survival is extremely poor: around 20 percent mortality by one week of age, 80 percent by around 2 months, and only 4 percent of children alive by one year.
How successful is the arterial switch operation when performed in time?▼
It gives around 95 percent survival at one year.
Is the surgical window different when TGA occurs together with a VSD?▼
Yes, slightly wider. The recommended timing for an arterial switch operation with VSD closure in this group is 4 to 8 weeks of life, since pulmonary artery pressure rises over time and these children can become inoperable if surgery is delayed.
In This Series: Correct Timing for Congenital Heart Surgery
- 1.Correct Timing for Congenital Heart Surgery
- 2.Atrial Septal Defect (ASD): Why the Best Age to Close It Is 3 to 4 Years
- 3.AV Canal Defect: Why Surgery Is Needed by 3 to 4 Months of Age
- 4.Coarctation of the Aorta: Why Immediate Surgery Prevents Death and Lifelong Hypertension
- 5.Cost of Congenital Heart Surgery in India
- 6.Late-Presenting Congenital Heart Disease: What to Do When Diagnosis Comes Too Late
- 7.What Makes a Good Paediatric Cardiac Surgery Programme
- 8.Patent Ductus Arteriosus (PDA): When to Close and How
- 9.Total Anomalous Pulmonary Venous Return (TAPVR): Why Surgery Cannot Wait
- 10.Tetralogy of Fallot: Timing of Repair and Why Waiting Is Dangerous
- 11.Transposition of the Great Arteries (TGA): Why Timing Is a Matter of Days
- 12.TGA with VSD and Pulmonary Stenosis: Rastelli and Nikaidoh Procedures
- 13.Truncus Arteriosus: Why Newborns Need Surgery at Diagnosis
- 14.Ventricular Septal Defect (VSD): When Small Holes Close on Their Own and When Surgery Can't Wait