As a parent, you know your child better than anyone. You notice when something is not right – when they tire more easily than other children, when their colour seems off, when they struggle to feed or cannot keep up at play. Sometimes these observations lead to an important discovery.
Congenital heart defects – structural abnormalities of the heart present from birth – are among the most common serious birth conditions globally. Many are detected at birth or in early infancy. But some are not identified until months or years later, when symptoms become more apparent as the child grows and places greater demands on their heart.
This guide is written for Sri Lankan parents. It explains what congenital heart defects are, what signs to look for at different stages of a child’s development, and when to seek specialist assessment – including how Sri Lankan families can access dedicated paediatric cardiac care in India.
What Are Congenital Heart Defects?
A congenital heart defect (CHD) is a structural abnormality of the heart or the major blood vessels connected to it that is present from birth. These abnormalities develop during the first eight weeks of pregnancy, when the heart is forming.
The effects of a congenital heart defect depend entirely on its type and severity:
- Some defects are minor – a small hole between chambers that may close on its own as the child grows, producing little or no impact on health
- Others are moderate – causing symptoms and requiring treatment but not immediately life-threatening
- Some are critical – threatening the child’s life in the newborn period and requiring urgent surgical or catheter-based intervention
The term congenital heart disease (CHD) covers a broad spectrum of conditions. No two children with CHD have exactly the same experience, which is why individualised specialist assessment is always essential.
How Common Are Congenital Heart Defects?
Congenital heart defects affect approximately 1 in every 100 newborns globally. This makes CHD the most common type of birth defect by a significant margin – more common than Down’s syndrome, cleft palate, and neural tube defects.
In Sri Lanka, with approximately 300,000 births per year, this means approximately 3,000 babies are born with some form of congenital heart defect each year. A proportion of these will require intervention.
The conditions that most commonly present with recognisable symptoms in childhood include:
- Ventricular septal defect (VSD) – the most common congenital heart defect, involving a hole between the two lower chambers
- Atrial septal defect (ASD) – a hole between the two upper chambers, which may not cause symptoms until later in childhood or adulthood
- Patent ductus arteriosus (PDA) – a blood vessel that normally closes after birth remains open
- Tetralogy of Fallot – a complex combination of four defects causing low oxygen levels in the blood
- Pulmonary stenosis – narrowing of the valve between the heart and lungs
- Coarctation of the aorta – narrowing of the main artery from the heart to the body
- Transposition of the great arteries – a critical defect where the two main arteries are switched in position
- Hypoplastic left heart syndrome – severe underdevelopment of the left side of the heart
Why Early Recognition Matters
The earlier a congenital heart defect is identified, the broader the range of treatment options available and the better the expected outcome.
For critical defects – including transposition of the great arteries, hypoplastic left heart syndrome, and severe pulmonary stenosis – survival depends on identification within days of birth and urgent intervention.
For moderate defects – including significant VSDs and ASDs – early identification allows:
- Timely treatment before the heart becomes stretched and weakened from compensating for the defect
- Prevention of pulmonary hypertension – irreversible high blood pressure in the lung blood vessels that develops over time in certain untreated defects and significantly worsens the prognosis
- Better growth and development – children with undetected heart defects often grow more slowly and have lower energy levels than their peers
For milder defects, early identification allows the family to understand what is happening, to know when intervention may be needed, and to have the child’s heart monitored appropriately over time.
The consequences of delayed diagnosis are not merely clinical. Many Sri Lankan parents who eventually receive a CHD diagnosis for their child describe months or years of knowing something was wrong, visiting multiple doctors, being told their child was fine, and continuing to worry without clear answers. Early specialist assessment – particularly if a concern has been raised – provides clarity and a pathway forward, whatever the outcome.
Early Signs in Newborns and Infants
The newborn and infant period is when the most critical congenital heart defects typically become apparent. Parents and healthcare providers who know what to look for can identify these conditions earlier.
Cyanosis – Blue or Purple Tinge to the Skin
Cyanosis – a bluish or purplish discolouration of the skin, particularly around the lips, mouth, and fingernails – is one of the most important warning signs of a heart defect in a newborn or infant.
Cyanosis reflects reduced oxygen levels in the blood – a condition called hypoxaemia. In a healthy newborn, mild and brief cyanosis of the hands and feet is normal in the first hours of life. Cyanosis that involves the lips, tongue, or central part of the body, or that persists beyond the first few hours, or that appears during feeding or crying, is not normal and requires immediate medical assessment.
Heart defects associated with cyanosis include Tetralogy of Fallot, transposition of the great arteries, pulmonary atresia, and other conditions that cause blood to bypass the lungs without being oxygenated.
Difficulty Feeding
Feeding is hard work for a newborn or infant. It requires sustained physical effort – sucking, swallowing, and breathing coordinated together. For a baby with a heart defect, the extra cardiac demand of feeding can quickly lead to exhaustion.
Signs of feeding difficulty associated with heart defects include:
- Taking much longer than expected to complete feeds – more than 20 to 30 minutes for a breastfeed, or more than 40 minutes for a bottle feed
- Falling asleep during feeding before taking adequate volume
- Sweating profusely during feeding – a sign of cardiovascular effort
- Pulling away from the breast or bottle, breathing hard, and then resuming feeding repeatedly
- Failing to gain weight adequately despite apparently feeding regularly
Poor weight gain in a newborn or infant without a clearly identified cause such as a feeding problem or maternal milk supply issue should always prompt assessment for an underlying heart condition.
Rapid or Laboured Breathing
The normal breathing rate in a newborn is 40 to 60 breaths per minute. A resting breathing rate consistently above 60 breaths per minute, or breathing that involves visible effort – the chest pulling in between the ribs, the nostrils flaring, or the head bobbing with each breath – warrants medical assessment.
In some heart defects, blood backs up into the lungs, making them stiffer and harder to expand. The infant breathes faster and with more effort to compensate.
Abnormal Heart Sounds (Murmur)
A heart murmur is an abnormal sound heard through a stethoscope during the cardiac examination. Many murmurs in newborns and infants are innocent – caused by the normal turbulence of blood flowing through the heart and vessels in the newborn period, and not associated with any structural defect.
However, some murmurs indicate structural heart disease. The character, location, timing, and loudness of a murmur provide important clinical information to the examining doctor.
If a murmur is identified in your child, ask whether it has been assessed as innocent or whether further investigation – specifically an echocardiogram – has been recommended. An innocent murmur does not require any follow-up; a murmur of uncertain significance or one suspected to be structural does.
Excessive Tiredness and Low Energy
A baby who is consistently difficult to rouse, unusually quiet, and who does not show the normal periods of alertness and interest in the environment may be showing signs of reduced cardiac output. While many factors can cause lethargy in a newborn, persistent unusual quietness alongside any of the other signs described here should prompt medical review.
Early Signs in Toddlers and Young Children
Some congenital heart defects are not identified in infancy and become apparent as the child grows and places greater physical demands on their cardiovascular system.
Reduced Exercise Tolerance
Children are naturally active. A toddler or young child who consistently cannot keep up with peers of the same age during active play, who stops to rest much more frequently than other children, or who complains of feeling tired after activities that do not tire similar-aged children, may have an underlying cardiac limitation.
The key word is consistently. All children have tired days. The concern is a persistent, consistent pattern where the child is notably limited compared to peers without a clear explanation.
Shortness of Breath With Activity
A child who becomes visibly breathless during ordinary play activities – not just during vigorous running, but during moderate activities like walking up stairs, playing in the garden, or participating in physical education – deserves cardiac assessment.
Squatting Episodes
In Tetralogy of Fallot and a small number of other cyanotic heart defects, children instinctively squat down during or after physical activity. Squatting increases the resistance to blood flow in the legs, which temporarily redirects more blood through the lungs and improves oxygen levels.
If you notice your child squatting during physical activity – particularly if they do this repeatedly and seem to feel better afterwards – this is a specific and important sign that warrants urgent cardiac assessment.
Recurrent Chest Infections
Children with certain congenital heart defects – particularly those involving left-to-right shunts such as VSD or ASD – have increased blood flow to the lungs. This increased pulmonary blood flow makes the lungs more susceptible to infection.
A child who has recurrent episodes of lower respiratory tract infection, bronchitis, or pneumonia – particularly in the first two to three years of life – should be assessed for an underlying cardiac cause.
Poor Growth and Failure to Thrive
Children with significant congenital heart defects often grow more slowly than their peers. The heart uses significant energy maintaining the circulatory demands of the defect, and the child’s nutritional intake may not be sufficient to support both normal growth and the extra metabolic demands of cardiac compensation.
A child who is consistently at or below the third centile for weight, or whose growth curve shows a significant downward crossing of centile lines, warrants investigation – and cardiac causes should be part of that workup, particularly if other signs are present.
Frequent Fainting or Episodes of Turning Blue
Any episode of unexplained loss of consciousness or fainting in a child requires urgent medical assessment. So does any episode in which a child’s lips or skin turn blue – even briefly, even during crying or exertion – particularly if this has not been previously assessed and explained.
Early Signs in Older Children and Adolescents
Some congenital heart defects – particularly atrial septal defects and milder forms of other conditions – are not detected until later childhood or adolescence, when they are identified incidentally or when symptoms become apparent.
Palpitations
A sensation of the heart beating rapidly, irregularly, or forcefully can occur in children and adolescents with certain types of congenital heart disease. Palpitations that are frequent, that occur at rest, that are associated with dizziness or near-fainting, or that are accompanied by chest discomfort, warrant cardiac investigation.
Chest Pain During Exercise
Chest pain during or immediately after exercise in a child or adolescent is always a symptom that requires medical assessment. While musculoskeletal chest pain (from the chest wall muscles and bones) is a much more common cause of chest pain in this age group than cardiac disease, chest pain occurring specifically with exertion should be assessed to exclude a cardiac cause before being attributed to other causes.
Reduced Athletic Performance
An adolescent who was previously active and is now noticeably less able to sustain athletic effort – who tires earlier, recovers more slowly, or who coaches and peers notice is underperforming relative to expectations – may have a cardiac cause for this change. This is particularly relevant when the change is progressive and not explained by detraining or illness.
High Blood Pressure in a Young Person
Coarctation of the aorta – a narrowing of the main artery from the heart – can cause elevated blood pressure in the arms in young people. Blood pressure is not routinely measured in most children, so coarctation can go undetected for years. If your child’s blood pressure is found to be elevated, particularly if the blood pressure difference between the arms and legs is significant, cardiac investigation is warranted.
Signs That Require Emergency Medical Attention
Some symptoms associated with congenital heart disease require immediate emergency medical care – not a scheduled appointment:
- Central cyanosis – blue or purple colour around the mouth, lips, or tongue – at any age
- Severe difficulty breathing or inability to breathe normally at rest
- Loss of consciousness or collapse
- Extreme pallor combined with sweating and rapid breathing in a newborn or infant
- A child who is unresponsive or extremely difficult to rouse
If any of these signs are present, seek emergency medical care immediately. Do not wait for a scheduled appointment.
How Are Congenital Heart Defects Diagnosed?
Echocardiography
The echocardiogram – cardiac ultrasound – is the primary diagnostic tool for congenital heart disease in children. It provides real-time images of the heart’s structure, showing the chambers, walls, valves, and major blood vessels. It is safe, painless, and can be performed in newborns, infants, and children of all ages.
If a congenital heart defect is suspected, an echocardiogram is the investigation that will either confirm or exclude the diagnosis. It is not appropriate to delay this investigation if a concern has been raised.
Electrocardiogram (ECG)
Records the electrical activity of the heart and can detect rhythm abnormalities and chamber enlargement.
Chest X-Ray
May show cardiac enlargement, abnormal heart shape, or changes in the blood vessel pattern of the lungs consistent with certain types of congenital heart disease.
Pulse Oximetry
A simple, painless measurement of oxygen levels in the blood using a small probe clipped to the finger or toe. A low oxygen saturation level is an important indicator of cyanotic heart disease.
Cardiac Catheterisation
An invasive procedure performed under sedation or general anaesthesia, in which a thin tube is guided through a blood vessel to the heart to measure pressures and assess anatomy. Also used as a treatment platform for catheter-based interventions such as ASD device closure and balloon valvuloplasty.
CT and MRI
Used for detailed assessment of complex anatomy, particularly for planning surgical or catheter-based interventions.
Can Congenital Heart Defects Be Detected Before Birth?
Yes. Fetal echocardiography – cardiac ultrasound of the unborn baby – allows detection of many congenital heart defects during pregnancy, typically performed between 18 and 22 weeks of gestation.
Fetal echocardiography is recommended for pregnancies at higher risk of cardiac abnormality, including:
- A previous child with congenital heart disease – increases the risk in subsequent pregnancies
- A parent with congenital heart disease
- Maternal diabetes
- Maternal infections during early pregnancy
- Certain medications taken during pregnancy
- Chromosomal abnormalities identified on prenatal screening, including Down’s syndrome (Trisomy 21) and other trisomies
- Abnormality detected on routine fetal anomaly ultrasound
When a cardiac abnormality is detected before birth, the family has the opportunity to receive specialist counselling about the condition, plan for delivery at a centre with neonatal and paediatric cardiac surgical capability, and prepare emotionally and practically for the care their baby will need.
Amrita Hospitals operates a dedicated Comprehensive Fetal Cardiac Centre for prenatal diagnosis and counselling for families where a cardiac abnormality is detected during pregnancy.
What Happens After Diagnosis?
A diagnosis of congenital heart disease in a child is significant, but it is not the end of the story. The enormous majority of children with congenital heart defects who receive appropriate treatment go on to live full, active, and healthy lives.
What happens after diagnosis depends on the type and severity of the defect:
Observation and Monitoring
For mild defects – particularly small VSDs and small ASDs that may close on their own – regular echocardiographic monitoring without immediate treatment may be all that is initially required. The cardiologist will define the monitoring schedule and the criteria that would indicate a need for intervention.
Catheter-Based Treatment
Many congenital heart defects can now be treated without open heart surgery, using catheter-based techniques. A device or instrument is delivered through a blood vessel to the heart, and the defect is closed or the valve is widened. This approach is associated with shorter hospital stays, faster recovery, and no chest incision.
Cardiac Surgery
For defects that cannot be treated by catheter-based techniques, open heart surgery is performed. Modern paediatric cardiac surgery has excellent outcomes at specialist centres, and many children are discharged from hospital within a week of surgery and return to normal activity within a few months.
Long-Term Follow-Up
Almost all children with congenital heart disease require lifelong cardiac follow-up, even after successful repair. The frequency of follow-up depends on the specific defect and the type of treatment performed. Parents should understand from the outset that a repaired heart is not the same as a normal heart – ongoing monitoring is part of responsible management.
How Do Sri Lankan Families Access Specialist Paediatric Cardiac Care in India?
For Sri Lankan families who have identified concerning signs in their child and need specialist paediatric cardiac assessment, or for families whose child has already received a CHD diagnosis and needs treatment, Amrita Hospitals in Kochi offers a complete paediatric cardiac programme – and Kochi is one hour from Colombo by air.
The process is straightforward:
- Gather any existing investigations – echocardiography reports, ECG, specialist letters, and the child’s growth records
- Share these with Amrita Info Centre Sri Lanka for forwarding to the paediatric cardiology team at Amrita Hospitals
- Receive an initial assessment and appointment schedule
- Apply for medical visas for the child and accompanying parent or guardian
- Travel to Amrita Hospitals for specialist paediatric cardiac assessment and, where needed, treatment
For guidance on visa documentation including the specific requirements when a minor is travelling, our article on the Complete Guide to Medical Visa for India from Sri Lanka covers every step in detail.
For a practical checklist of all documents to prepare before travel including those specific to children, our article on documents you need to travel to India for medical treatment from Sri Lanka provides full guidance.
To understand the full range of paediatric cardiac services available, explore children’s heart treatment and paediatric cardiology in India
Frequently Asked Questions
My baby has been told they have a heart murmur. Does this mean they have a heart defect? Not necessarily. Many heart murmurs in newborns and infants are innocent – caused by the normal turbulence of blood flow in the newborn period, with no underlying structural abnormality. However, some murmurs do indicate structural heart disease. An echocardiogram (cardiac ultrasound) is the investigation that definitively distinguishes an innocent murmur from one caused by a structural defect. If your baby’s doctor has identified a murmur and is uncertain about its cause, requesting an echocardiogram is appropriate.
My child tires easily but the doctor said their heart sounds fine. Should I be reassured? A normal physical examination, including heart auscultation, does not exclude all congenital heart defects. Some defects – particularly ASDs – may produce no audible murmur and cause subtle symptoms for years before being diagnosed. If you are concerned about your child’s exercise tolerance, persistence in seeking further investigation – including an echocardiogram – is reasonable.
Can a child with a repaired heart defect play sport and live a normal life? Many children with repaired congenital heart defects participate fully in sport and normal childhood activities. The specific activity recommendations depend on the type of defect and the nature of the repair. Your child’s cardiologist will provide guidance on which activities are safe and whether any restrictions apply. The general goal of paediatric cardiac care is to enable children to live as full and normal a life as possible.
Is congenital heart disease hereditary? The inheritance pattern varies by defect type. Most congenital heart defects are not caused by a single inherited gene in the way that conditions like thalassaemia are. However, the risk of congenital heart disease is elevated in subsequent pregnancies when a previous child or a parent has been affected. Genetic counselling can provide specific recurrence risk information for your family’s situation.
How will I know if my child needs surgery? This decision is made by the paediatric cardiologist and cardiac surgeon based on the specific defect, its severity, the child’s symptoms, and whether there is evidence of the heart being placed under increasing strain by the defect. Many families find it helpful to ask their child’s cardiologist to explain the specific measurements or criteria that would indicate a need for intervention, so that they understand what is being monitored at each follow-up appointment.
What is the success rate of congenital heart surgery in children? Outcomes from paediatric cardiac surgery at experienced, high-volume centres have improved dramatically over the past three decades. For most common defects, including VSD repair, ASD closure, and Tetralogy of Fallot repair, the surgical success rate at specialist centres is very high, and the large majority of children go on to lead healthy and active lives after repair. For complex and rare defects, outcomes are more variable and depend heavily on the specific anatomy and the experience of the surgical team.
Conclusion
As a parent, you are your child’s most important advocate. Knowing the early signs of congenital heart defects in children – and knowing when to push for further investigation – can make a real difference to how early a condition is identified and how well it is ultimately managed.
If you are concerned about any of the signs described in this guide, seek a specialist paediatric cardiac assessment. An echocardiogram that shows everything is normal is reassuring. An echocardiogram that identifies a defect opens the door to timely treatment and the best possible outcome for your child.
Amrita Info Centre Sri Lanka is here to support Sri Lankan families in accessing specialist paediatric cardiac care at Amrita Hospitals in Kochi – one hour from Colombo, with a dedicated paediatric cardiac programme and a coordination team that manages the process from this end.