Pediatric Echocardiography

Introduction

If your child has been referred for a pediatric echocardiogram, you are likely holding two things at once: relief that a careful test is being arranged, and worry about what it might find. Both feelings are normal. A pediatric echocardiogram — often shortened to “pediatric echo” — is one of the most commonly used tests in children’s heart care. It is painless, uses no radiation, and provides detailed information about how a child’s heart is built and how it is working.

This guide is written for parents and family members of children who are about to have, or have just had, a pediatric echocardiogram. It explains what the test is, why doctors order it, how to prepare a baby or older child, what happens in the room, how results are interpreted, and what the next steps might look like depending on what the scan shows. Whether your child is a newborn in a nursery, a school-age child with a newly heard heart murmur, or a teenager being followed after surgery for a congenital heart condition, the same test — with small adjustments — serves all of them.

What Is Pediatric Echocardiography?

Pediatric echocardiography is an ultrasound examination of a child’s heart. The full clinical name is “pediatric echocardiogram,” and it is sometimes just called an “echo.” Like the ultrasound used during pregnancy, it works by sending harmless high-frequency sound waves into the body using a small handheld device called a transducer. These sound waves bounce off the heart’s walls, valves, and blood and return to the transducer, which converts them into moving images on a screen.

From those images, a pediatric cardiologist can see:

• The size and shape of each of the four heart chambers
• How the heart valves open and close
• Whether there are any holes or unusual connections between chambers
• The direction and speed of blood flow through the heart and the great vessels (the aorta and pulmonary artery)
• How strongly the heart muscle is squeezing
• Pressures estimated inside the heart chambers and lungs

Echocardiography is different from an ECG (electrocardiogram). An ECG records the electrical signals of the heart and is useful for rhythm problems. An echo records the structure and movement of the heart. The two tests are often used together because they answer different questions.

A key point for parents: pediatric echocardiography uses no X-rays and no radiation of any kind. This is one reason it has become a primary tool in children’s heart care — it can be repeated as often as needed, even in tiny premature babies, without cumulative radiation concerns.

Types of Pediatric Echocardiography

Transthoracic Echocardiography (TTE)

This is the standard and most common form. The transducer is placed on the outside of the chest wall, and images are taken from several positions: below the breastbone, between the ribs, and just above the collarbone. It is completely external. Almost all routine pediatric echocardiograms are transthoracic studies.

Doppler and Color Doppler Echocardiography

Doppler is not a separate scan but a set of measurements taken during the same study. Doppler captures the speed and direction of blood flow. Color Doppler maps that flow onto the moving image in colour, so the cardiologist can see, for example, whether blood is leaking backwards across a valve or jetting through a small hole between chambers. Almost every pediatric echocardiogram today includes Doppler and color Doppler.

Fetal Echocardiography

This is a specialised heart scan performed during pregnancy, usually between 18 and 24 weeks of gestation, although it can be done earlier or later. It is offered when there is an increased chance of a congenital heart defect — for example, when there is a family history of congenital heart disease, when the mother has certain medical conditions such as diabetes or lupus, or when a routine pregnancy ultrasound has raised a question about the baby’s heart. The probe is placed on the mother’s abdomen rather than on the baby. A fetal echo can identify many serious heart conditions before birth, which allows the family and medical team to plan delivery and early care.

Transesophageal Echocardiography (TEE)

In a transesophageal echo, the probe is mounted on a thin flexible tube that is passed through the mouth into the food pipe (oesophagus), which lies just behind the heart. This gives very clear pictures of structures that can be harder to see from the chest, particularly in older or larger children and after some surgeries. Because the probe is internal, TEE is performed under sedation or general anaesthesia. It is most often used during heart surgery or certain catheter procedures, or when a transthoracic scan has not given a clear enough answer.

Stress Echocardiography

A stress echo compares images of the heart at rest and during or just after exercise. It is used in older children and adolescents to evaluate symptoms such as chest pain or fainting with exertion, or to follow up certain congenital and acquired heart conditions. Younger children who cannot exercise on a treadmill may have medication-based stress echoes in specific situations.

Three-Dimensional Echocardiography

Modern echo machines can build three-dimensional images of the heart and valves. This is particularly useful in planning surgery for complex congenital heart defects, because it shows how structures relate to each other in space rather than as flat slices.

Why Is Pediatric Echocardiography Performed?

Doctors order a pediatric echocardiogram when they want to look directly at how a child’s heart is built and how it is working. Common reasons include the following.

To Evaluate a Heart Murmur

A heart murmur is an extra sound heard between heartbeats. Most childhood murmurs are “innocent” — they come from normal blood flow and do not indicate any problem. However, some murmurs can be the first sign of a structural issue such as a hole in the heart or a valve abnormality. An echocardiogram can quickly distinguish between an innocent murmur and one that needs follow-up.

To Investigate Suspected Congenital Heart Disease

Congenital heart disease (CHD) refers to differences in the heart’s structure that are present from birth. These range from small holes that may close on their own to complex conditions that need surgery. Echocardiography is the central test for diagnosing CHD in newborns, infants, and older children.

To Evaluate Specific Symptoms

An echo may be requested when a child has:

• Bluish discolouration of the lips, tongue, or fingertips (cyanosis)
• Rapid breathing or breathing difficulty not explained by lung problems
• Poor feeding, sweating during feeds, or poor weight gain in infancy
• Chest pain, fainting, or palpitations, especially with exercise
• Unexplained tiredness or reduced exercise tolerance

To Follow Up Known Heart Conditions

Children who have had heart surgery, catheter procedures, or who live with a chronic heart condition such as cardiomyopathy typically have echocardiograms at scheduled intervals to track how the heart is doing over time.

To Screen Children at Increased Risk

Doctors may order an echocardiogram in children with genetic conditions associated with heart abnormalities, such as Down syndrome, Turner syndrome, Marfan syndrome, or DiGeorge (22q11.2 deletion) syndrome. Children with certain systemic illnesses — for example, suspected rheumatic fever, Kawasaki disease, or some forms of muscular dystrophy — are also routinely evaluated with echocardiography.

To Monitor the Heart During Treatment

Some childhood cancer treatments, particularly certain chemotherapy drugs, can affect heart muscle function. Children receiving these treatments often have echocardiograms before, during, and after therapy to monitor the heart.

To Guide and Confirm Treatment

Echocardiography is used in the operating theatre and the cardiac catheterisation laboratory to guide procedures in real time, and is repeated afterwards to confirm that the treatment achieved the intended result.

Preparing for a Pediatric Echocardiogram

One of the gentler aspects of this test is that preparation is minimal. The exact instructions depend on your child’s age and whether sedation is planned.

For Most Children: No Special Preparation

For a routine transthoracic echocardiogram in a cooperative older child, no fasting, no special diet, and no change to medication is usually needed. Your child can eat, drink, and take their regular medicines as normal. Dress them in comfortable clothing — a two-piece outfit makes it easier to expose just the chest area.

For Infants and Toddlers

Younger children do best when they are calm or sleeping. Parents are often advised to:

• Bring a favourite blanket, soft toy, or pacifier
• Time the appointment around a usual nap, if possible
• Feed a baby just before the test so they are content and may sleep through it
• Bring a bottle or breastfeed during the scan if the child becomes restless

Letting a young child watch a phone or tablet during the scan is generally fine and often helpful for keeping them still.

When Sedation May Be Needed

Some children, particularly those between about six months and three years of age, may be too active to keep still long enough for the complete set of images. In these cases, the team may suggest a mild sedative given by mouth so the child can sleep through the scan. Sedation is given by trained staff with monitoring of breathing and heart rate. Where sedation is planned, your child will be asked to fast for a few hours beforehand — the team will give you specific timings based on age and the medication used.

Transesophageal echo is performed under deeper sedation or general anaesthesia and requires fasting and a separate set of pre-procedure instructions.

What to Bring

• Any previous heart-related reports, scans, or ECGs
• A list of your child’s current medicines
• The referral letter from the doctor who ordered the echo
• Comfort items for the child

Talking to Your Child Beforehand

For older children, a brief, honest explanation reduces anxiety. You can describe the test as a special camera that uses sound to take a picture of the heart, that there are no needles, that the room is dim so the doctor can see the screen, and that some gel will feel a little cold but not uncomfortable. Many hospitals have child-friendly leaflets or videos that help.

What Happens During a Pediatric Echocardiogram

Knowing what to expect, step by step, often helps both parent and child feel more settled.

Arrival and Check-in

You will check in at the cardiology or imaging department. A sonographer — a person specially trained in heart ultrasound — will usually perform the scan, and a pediatric cardiologist reviews and reports the images.

Positioning

Your child will be asked to remove their top and lie down on an examination bed, usually on their back and slightly turned to the left. Babies may stay on a parent’s lap if that helps them stay calm. The room lights are dimmed so the sonographer can see the screen clearly.

Electrodes

Three small stickers (electrodes) are placed on the chest. These connect to wires that record the heart’s rhythm during the scan, so each ultrasound image can be matched to the heartbeat. The stickers feel like small plasters and come off easily afterwards.

Gel and Imaging

A warm, water-based gel is placed on the chest. The sonographer moves the transducer gently across different areas: just below the ribs, between the ribs on the left side, and at the base of the neck. From each window, several images and short video clips are recorded. The sonographer may ask older children to take a breath in, hold it, or turn slightly.

Sounds You May Hear

During the Doppler part of the test, the machine often makes a swooshing sound as it measures blood flow. This is normal and just an audible version of the flow being recorded.

Duration

A complete pediatric echocardiogram typically takes 30 to 60 minutes, depending on the complexity of the heart and how settled the child is. Newborn studies and complex congenital heart cases may take longer. Fetal echocardiograms also usually take 45 to 60 minutes.

The Parent’s Role

Parents are almost always welcome to stay in the room. For young children, you can hold their hand, sing softly, offer a feed, or play a video. Your presence is one of the most effective ways to keep the scan smooth and complete.

Recovery and Aftercare

For a standard transthoracic echocardiogram, there is essentially no recovery. The gel is wiped off, the electrodes are removed, and your child can dress and leave. They can eat, drink, return to school or nursery, and resume play immediately. There are no restrictions and no side effects.

If sedation was given by mouth for the scan, your child will be observed for a short period until they are fully awake, drinking normally, and steady on their feet. Sedated children may be drowsy for the rest of the day, and the team will give specific advice about feeding, supervision, and when to resume school.

Parents often find the time between the scan and the conversation about results the hardest part. Knowing what to expect from that conversation can help.

How Results Are Produced

The sonographer records dozens of clips and measurements during the scan. A pediatric cardiologist then reviews the recordings, takes additional measurements as needed, and writes a report. In many centres, especially when the scan is being done because of an urgent concern, the cardiologist will also come and have an initial look at the screen while you are still there.

Timing

Preliminary findings — particularly for normal or clearly reassuring scans — are sometimes shared on the same day. A formal written report is usually available within one to two working days. If the scan was done as part of inpatient care, the team caring for your child will discuss results with you directly.

What the Report May Describe

An echocardiogram report typically includes:

• Comments on each heart chamber: size and how well it is squeezing
• Comments on each heart valve: whether it opens fully and whether it is leaking
• Comments on the great vessels coming out of the heart
• Any holes, abnormal connections, or other structural findings
• Pressure estimates, particularly in the lungs
• An overall summary and recommendations for follow-up

Common Findings and What They Generally Mean

Some findings parents commonly hear about include:

• Structurally normal heart. The scan shows no abnormality and explains, for example, that a murmur is innocent.
• Small atrial or ventricular septal defect (ASD or VSD). A small hole between heart chambers. Many small defects close on their own during early childhood; others are followed and may need treatment if they remain.
• Patent ductus arteriosus (PDA). A small blood vessel that normally closes shortly after birth has stayed open. Management depends on the size and the age of the child.
• Patent foramen ovale (PFO). A small flap-like opening between the upper chambers that is present in many newborns and often closes naturally.
• Mild valve abnormalities. Many small valve issues need only periodic monitoring.
• Complex congenital heart disease. Less common, but when present, the echocardiogram is the foundation on which the surgical or catheter treatment plan is built.

The meaning of any specific finding depends on your child’s overall picture — their age, growth, symptoms, and any other tests. The pediatric cardiologist’s explanation in your child’s context is what matters, and it is reasonable to ask for explanations to be repeated, drawn out on paper, or written down.

Questions Worth Asking

• What did the scan show, in simple terms?
• Is anything seen on the scan likely to cause my child symptoms now or later?
• Does anything need treatment, and if so, what kind and when?
• Does this scan need to be repeated, and if so, how soon?
• Are there any activities my child should avoid?
• Are there warning signs I should watch for at home?

Risks and Limitations

Pediatric echocardiography is considered one of the safest tests in medicine. There is no radiation, no needle, no injected dye in a standard study, and no known harmful effect of diagnostic ultrasound on the heart or other tissues. It can be repeated as often as needed.

Where Small Risks Exist

• Sedation. When sedation is used, it carries the same small risks as any sedation in a child — mostly related to breathing — which is why monitoring is mandatory. These risks are kept low by the use of pediatric-trained staff and careful selection of children who are suitable for sedation.
• Transesophageal echo. Because the probe is passed through the mouth into the oesophagus, there are small risks of throat soreness, and rarely, irritation or injury to the oesophagus. Anaesthesia carries its own considerations. These risks are weighed against the benefit of the clearer images TEE can provide when needed.

Limitations of the Test

Echocardiography is powerful, but no test is perfect.

• Image quality can be limited in older or larger children where the heart sits deeper in the chest, or after surgery when scar tissue may block some views.
• Very small abnormalities can occasionally be missed.
• Some questions about anatomy and physiology cannot be fully answered by echo alone and may need additional tests such as cardiac MRI, CT, or cardiac catheterisation.

When this happens, the cardiologist will explain why a further test is being suggested.

How Pediatric Echocardiography Fits with Other Tests

Children with suspected or known heart conditions may have a combination of investigations. Echocardiography typically sits at the centre of pediatric cardiac evaluation because it is safe, repeatable, and answers most structural and functional questions. Other tests that may be used alongside it include:

• Electrocardiogram (ECG). Records the heart’s electrical activity and is used together with echo to evaluate murmurs, palpitations, fainting, and many heart conditions.
• Chest X-ray. Gives an overall picture of the heart size and the lungs, often as an initial test.
• Holter or event monitor. Records the heart rhythm over hours to weeks, particularly useful for intermittent rhythm problems.
• Cardiac MRI. Provides detailed three-dimensional information about heart structure and tissue, often used in complex congenital heart disease and cardiomyopathy.
• Cardiac CT. Used selectively, particularly for vascular anatomy.
• Cardiac catheterisation. An invasive test and treatment tool, used when detailed pressure measurements are needed or when a catheter-based treatment is planned.

For most children, echocardiography either provides the answer on its own or guides which, if any, of the further tests are needed.

The Pediatric Cardiology Team

The people involved in your child’s echocardiogram are usually:

• The pediatric cardiologist — a paediatrician with additional training in children’s heart conditions, who reviews and reports the scan and explains the findings.
• The pediatric sonographer — trained specifically in scanning children’s hearts. Pediatric echocardiography is a distinct skill set from adult echo because children’s hearts are smaller, beat faster, and may have complex anatomy.
• Nursing and play specialist staff — who help prepare children, distract them during the scan, and support parents.

When choosing where your child has an echocardiogram, what tends to matter most is the team’s experience with children — particularly with the age group and condition relevant to your child. For complex congenital heart disease, scans are best interpreted in a centre with regular experience of these conditions and access to the wider pediatric cardiac team.

Special Situations

Newborns and Premature Babies

Echocardiography is often performed in the neonatal unit at the cot side, using a portable machine. It can be done without disturbing the baby’s feeding, warmth, or care. It is the main tool for evaluating suspected heart problems in newborns and is also used to assess heart function in very premature babies, where the circulation goes through important transitions in the first days and weeks of life.

Children with Genetic Syndromes

Children with conditions such as Down syndrome, Turner syndrome, Williams syndrome, Marfan syndrome, and 22q11.2 deletion (DiGeorge) syndrome have higher rates of certain heart abnormalities. Echocardiography is part of standard care, often starting in infancy and repeated through childhood.

After Heart Surgery or Catheter Procedures

Children who have had surgical or catheter-based treatment for congenital heart disease usually have echocardiograms at planned intervals for the rest of childhood and often into adult life. These scans monitor the surgical repair, check valve function, and look for changes that might need further intervention.

Children with Suspected Kawasaki Disease

Kawasaki disease, an inflammatory condition mostly affecting young children, can damage the coronary arteries. Echocardiography is used both to diagnose coronary involvement and to monitor children during and after treatment.

Athletes and Older Children with Symptoms During Exercise

Older children and adolescents with exercise-related chest pain, fainting, or palpitations may have an echocardiogram as part of evaluation, sometimes along with stress testing and a Holter monitor. A normal echo is reassuring; an abnormal echo guides specific next steps.

Frequently Asked Questions

Is a pediatric echocardiogram safe?

Yes. Diagnostic ultrasound has been used in medicine for decades and has no known harmful effects on children. There is no radiation. The test can be repeated as often as clinically needed, even in newborns and premature babies.

Does it hurt?

No. The only sensation is gentle pressure from the probe and the feel of the gel on the skin. There are no needles for a standard transthoracic echo.

How long will the test take?

A complete pediatric echocardiogram usually takes 30 to 60 minutes. Simpler follow-up scans may be quicker. Fetal echocardiograms and complex congenital heart studies may take longer.

Will my child need sedation?

Most children do not. Newborns often sleep through the scan, and older children can stay still with distraction. Sedation is sometimes considered in toddlers and young children who cannot stay still enough for a complete study, and is always discussed with parents in advance.

Can I stay with my child during the scan?

In almost all centres, yes. Your presence is welcomed and often actively helpful in keeping the child calm.

When will we get the results?

Preliminary findings are often shared on the same day, particularly if the scan was urgent or clearly normal. A full written report is usually available within one to two working days. If the scan is part of inpatient care, the team will discuss the results directly with you.

If the echo is normal, does that mean my child’s heart is definitely fine?

A normal echocardiogram is strongly reassuring and answers most of the structural questions doctors ask. It does not, by itself, evaluate the heart’s electrical rhythm — that is the job of an ECG or rhythm monitor. The cardiologist will explain whether any further testing is needed in your child’s case.

My child had a normal echo as a baby. Does it need to be repeated?

It depends on the reason for the original scan and on any new symptoms or findings. Some children need only one scan in childhood; others are followed at intervals because of a known condition. The cardiologist’s recommendation is based on what was originally seen and on your child’s current health.

Will the scan show whether my child can play sports?

An echocardiogram contributes to that conversation but rarely answers it alone. Sports clearance for children with heart conditions depends on the specific finding, the child’s age, the type of sport, and other tests such as ECG and sometimes exercise testing. The pediatric cardiologist can advise based on the full picture.

What is fetal echocardiography, and is it offered routinely?

Fetal echocardiography is a detailed ultrasound of the baby’s heart during pregnancy. It is not part of every pregnancy — it is offered when there is an increased chance of a heart problem, such as a family history of congenital heart disease, certain maternal conditions, or a question raised on a routine pregnancy scan.

Is a pediatric echocardiogram the same as an ECG?

No. An echocardiogram uses ultrasound to look at the heart’s structure and movement. An ECG records the heart’s electrical signals using stickers on the skin. The two tests answer different questions and are often used together.

Conclusion

A pediatric echocardiogram is a careful, gentle, and information-rich look at a child’s heart. For most families, the test takes less than an hour, causes no discomfort, and provides answers that shape the next step in care — whether that step is simple reassurance, periodic follow-up, or a clear plan for treatment.

If your child is about to have an echo, the most useful things you can do are practical: dress them comfortably, bring something familiar, time the visit around a feed or a nap if they are young, and plan to stay with them in the room. If the scan has already happened and you are waiting for results, write down your questions before the conversation with the cardiologist and ask for anything that is unclear to be explained again. Pediatric heart care is a long conversation, and understanding each step of it is part of how families and clinical teams look after a child’s heart well.