What Is Transposition of the Great Arteries (TGA)? Transposition of the great arteries is a congenital heart disease in which the normal connections of the aorta and pulmonary artery leaving the baby's heart are reversed. In a normal heart, blood poor in oxygen is sent to the lungs while blood rich in oxygen is pumped to the body. In transposition of the great arteries, this circulation pattern is disrupted. Especially in the most common type, d-TGA, blood poor in oxygen is sent back to the body while oxygenated blood returns to the lungs. This situation can prevent enough oxygen from reaching the baby's organs and can be life-threatening right after birth. Why Does Transposition of the Great Arteries Occur? TGA is a structural anomaly that occurs during the baby's heart development in the womb. The exact cause of the disease is unknown in most cases. Some genetic and environmental factors are thought to play a role. TGA does not mean that it is caused by something the mother or father did. What Are the Symptoms of Transposition of the Great Arteries in Babies? Symptoms of TGA usually appear in the first hours or days after birth. The most common symptoms are as follows: - Bluish discoloration of the lips, tongue, and skin - Low oxygen level in the blood - Rapid breathing - Feeding difficulty - Weakness and tiring quickly - Circulatory disturbance and changes in consciousness in severe cases Important: Marked bluish discoloration and low oxygen in a newborn baby require urgent medical evaluation. How Is Transposition of the Great Arteries Diagnosed? In some babies, TGA can be detected before birth thanks to fetal echocardiography performed in the womb. After birth, an evaluation is made by pediatric cardiology specialists. The main methods used in diagnosis: 1. Echocardiography (ECHO) It is the main diagnostic method that evaluates the structure of the heart, the connections of the great arteries, and blood flow. 2. Oxygen Saturation Measurement The oxygen level in the baby's blood is measured. Low values can be a sign of a serious heart disease. 3. Electrocardiography (ECG) The electrical activity and rhythm of the heart are evaluated. 4. Chest X-Ray It can provide helpful information about heart size and lung circulation. 5. Advanced Imaging Methods When necessary, cardiac tomography or other advanced examinations can be used. How Is the Initial Treatment Done in Transposition of the Great Arteries? Newborn babies diagnosed with TGA generally need to be followed in the neonatal intensive care unit. Before surgical treatment, various interventions may be applied to support the baby's blood circulation and oxygenation. Prostaglandin E1 Treatment It helps keep open the vessel connection called the ductus arteriosus, which begins to close after birth. In this way, mixing of blood between the two circulations can be supported. Balloon Atrial Septostomy When the opening between the atria of the heart is insufficient, this opening can be widened with the help of a catheter. This procedure can help prepare the baby for surgery by increasing the passage of oxygenated blood into the body circulation. These methods generally provide temporary support. Surgical intervention is needed for permanent treatment. When Is Transposition of the Great Arteries Surgery Performed? In the most common type, d-TGA, permanent treatment is generally open heart surgery. In most babies, the operation is performed in the first days or within the first few weeks after birth. The timing of surgery is determined according to the following factors: - The baby's general health condition - The oxygen level in the blood - The anatomical structure of the heart - Accompanying congenital heart anomalies - The functioning state of the left ventricle Early surgical intervention is of great importance in preventing organ damage due to lack of oxygen. How Is Transposition of the Great Arteries Surgery Performed? The most commonly used surgical method in the treatment of TGA is the arterial switch operation (Jatene operation). The aim of this operation is to create normal blood circulation by connecting the aorta and pulmonary artery to the correct ventricles. During the operation: 1. The aorta and pulmonary artery are separated at suitable levels. 2. Both vessels are reconnected to the correct heart outlet. 3. The coronary vessels that supply the heart are moved to the new aortic root. 4. Accompanying openings inside the heart are repaired when necessary. 5. Heart and circulatory functions are checked. The arterial switch operation is an important surgical procedure performed by experienced pediatric heart surgery teams. In some complex anatomical situations, different surgical methods may be needed. Is TGA Surgery Risky? Transposition of the great arteries surgery is a serious open heart operation performed in the newborn period. Today, successful results are achieved in many babies thanks to advanced surgical techniques, anesthesia practices, and neonatal intensive care facilities. However, some complications may develop during or after the operation. These may include: - Bleeding and infection - Heart rhythm disorders - Temporary or permanent problems in heart function - Complications related to the coronary vessels - Narrowing in the great vessels - The need for reintervention The risks of the operation vary according to the baby's anatomical features and general health condition. The Recovery Process After Surgery After TGA surgery, babies are closely followed in the pediatric heart surgery intensive care unit. During this process, heart function, breathing, oxygen level, and the blood supply to the organs are evaluated. Some babies may need temporary breathing support after surgery. During the recovery process, the feeding routine, weight gain, and heart function are checked regularly. The length of hospital stay may vary according to the baby's speed of recovery and possible complications. Can Babies Live a Normal Life After TGA Surgery? Many children who have had a successful arterial switch operation can show normal growth and development. In later years, children can continue their education and take part in physical activities in line with the cardiology specialist's recommendations. However, lifelong cardiological follow-up is important after the operation. In particular, the condition of the coronary vessels, heart valves, connections of the great vessels, and heart function should be evaluated at regular intervals. In some patients, additional interventions may be needed in later years. Why Does Early Diagnosis Save Lives? Transposition of the great arteries is a critical congenital heart disease that can cause serious oxygen deficiency right after birth. Detecting the disease in the womb or shortly after birth allows the baby to be treated at a center with suitable equipment. The coordinated work of pediatric cardiology, pediatric heart surgery, and neonatal intensive care teams plays an important role in treatment success. Remember: In transposition of the great arteries, early diagnosis and surgical treatment performed on time can be life-saving. Thanks to correct treatment and regular follow-up, many children can lead a healthy and active life.