Total Anomalous Pulmonary Venous Return
Total anomalous pulmonary venous return (TAPVR) is a critical birth defect of the pulmonary veins that causes oxygen-rich blood from the lungs to return to the wrong side of the heart. Normally, our pulmonary veins return to the left atrium. In TAPVR, the veins return elsewhere, like the superior vena cava (supracardiac), inferior vena cava (infracardiac), the right atrium (intracardaic), or even a combination of the above or to other vessels. This causes oxygen-rich blood to mix with oxygen-poor blood in the right atrium. The mixed blood gets to the body through a hole between the heart chambers and robs the body of the oxygen it needs. Children have varying degrees of cyanosis associated with TAPVR, depending on the communication between the chambers of the heart, usually being an atrial septal defect. Children can be extremely sick if there is an obstruction to blood flow in TAPVR. Children with obstructed blood flow will need surgery immediately.
All babies born with TAPVR will likely need surgery in the first year of life.
As the leading providers of pediatric heart care in Louisville and Southern Indiana, our cardiothoracic surgeons are experienced with successfully repairing TAPVR. They have the skill and training to know what needs to be done quickly to repair TAPVR — sometimes in the first hours of a baby’s life.
The board-certified and fellowship-trained specialists at Norton Children’s Heart Institute, affiliated with the University of Louisville, have the skill and experience to provide a pinpoint diagnosis and develop a customized treatment plan for you and your child.
Symptoms of TAPVR usually include:
- Acidosis (acid in the blood)
- Ashen or bluish skin color
- Blood pressure issues
- Difficulty breathing
- Extreme sleepiness
- Poor feeding
- Pounding heart
- Weak pulse
Other signs may include a heart murmur — or whooshing sound — that a doctor can hear through a stethoscope. Mild cases may not be noticed for weeks or months until the child has symptoms such as tiring easily, rapid or difficult breathing, or poor growth.
TAPVR is a rare heart defect, and in most cases the cause is unknown. While genetics can raise the risk, TAPVR most often happens by chance.
Ultrasound or other prenatal tests can reveal TAPVR during pregnancy. If your doctor suspects your baby has TAPVR, he or she will order additional tests, such as a fetal echocardiogram. A fetal echocardiogram is an ultrasound of the fetus’ heart and major blood vessels. Norton Children’s Heart Institute physicians will assist in diagnosis and help prepare a delivery plan for both mom and baby, including the baby’s immediate care plan following delivery.
TAPVR also can be found after a baby is born. If an infant shows signs of a heart defect, an echocardiogram can be performed at the bedside and will diagnose TAPVR.
Babies born with TAPVR will need surgery to restore normal blood flow through the heart. Surgery options include placing the child on a heart-lung machine (cardiopulmonary bypass) and making the connection between the pulmonary veins and the left atrium.
In the most common type of TAPVR, all four pulmonary veins come to a central spot — called a confluence — that is behind the left atrium. In this case, a full repair is done by connection the confluence into the back of the left atrium. In other forms of TAPVR, the surgeons find other ways to connect the pulmonary veins back to the left atrium. After surgery, it is possible that scar tissue can form around the connection between the pulmonary veins and the left atrium. If the scar tissue growth is severe enough, additional surgery may be needed. Between 15 and 20 percent of children with TAPVR may need cardiac catheterization or surgery later in life to repair narrowed veins.
A baby who has an obstructive form of TAPVR (meaning the blood cannot get to the heart from the lungs) may need emergency surgery. This surgery often is performed when the baby is just hours old. If the pulmonary veins are not obstructed, surgery can wait until a few weeks after birth.
TAPVR complications and after-care
Surgery recovery is closely related to how healthy the lungs are before surgery. Approximately 5 to 8 percent of children who have the procedure do not survive. The risk varies greatly from child to child. It depends on what kind of TAPVR the child has and the amount of obstruction the child has before surgery.
Children with surgically repaired TAPVR may have lifelong complications. They may need medication to prevent infection of the heart’s lining (endocarditis) or an odd heartbeat (arrhythmia). Children and adults with TAPVR will need regular visits with a pediatric cardiologist to monitor their progress and complications, as well as screen for other conditions that could develop over time, including erratic heartbeat, blood clots, leaky valves and blocked blood vessels.
Why Norton Children’s Heart Institute?
Norton Children’s Heart Institute, affiliated with the University of Louisville, is a comprehensive pediatric heart surgery, heart failure and heart transplant program serving Kentucky, Southern Indiana and beyond.
The goal of the full-service Norton Children’s Heart Institute is to provide care for the child and the whole family. Our specialists are prepared to repair even the most complex congenital and acquired heart conditions.
Our heart team includes:
- Pediatric cardiothoracic surgeons
- Pediatric transplant surgeons
- Pediatric cardiologists
- Fetal cardiologists
- Adult congenital heart cardiologists
- Heart failure/heart transplant cardiologists
- Pediatric electrophysiologists
- Pediatric cardiac catheterization cardiologists
- Pediatric cardiovascular anesthesiologists
- Pediatric intensive care physicians
- Cardiac critical care nurses
- Critical care pharmacists
- Family support team
- Child life specialists
- Rehabilitation specialists
- Social workers
Norton Children’s Heart Institute
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