The birth of a child is one of life’s purest joys, but that joy can quickly turn into fear when a heart defect is discovered. Today, however, rapid advancements in paediatric cardiology in Malaysia have transformed such a diagnosis from a sentence of despair into a journey filled with hope.

According to Dr Lim Wooi Kok, Consultant Paediatrician and Paediatric Cardiologist at Sunway Medical Centre, congenital heart disease (CHD) affects about one in every 100 babies. Despite this, modern imaging and interventional techniques now allow many children to survive into adulthood, a significant improvement compared to decades ago.


Heart problems in children generally fall into two main categories: congenital and acquired. Congenital heart conditions are present at birth and include both acyanotic or “pink” defects, as well as cyanotic or “blue baby” conditions. These are often detected soon after birth, especially when proper newborn pulse oximetry screening reveals oxygen levels below 95 percent. Diagnosis is usually confirmed through cardiac ultrasound, or echocardiography. More serious cyanotic conditions, such as Tetralogy of Fallot, Transposition of the Great Arteries, and Pulmonary Atresia, require urgent attention, particularly when a baby’s lips and extremities appear bluish.

Acquired heart conditions, on the other hand, develop later in life and include illnesses such as Kawasaki disease, rheumatic valve disease, and arrhythmias. These conditions typically present with symptoms like prolonged fever, chest pain, or fainting spells. During examination, doctors may detect heart murmurs, and further confirmation is often obtained through an echocardiogram.

With advancements in cardiac imaging, specialists are now able to visualise the heart with remarkable clarity and precision. Dr Lim, who has extensive expertise in cardiac multimodality imaging, uses tools such as echocardiography, CT scans, and MRI to produce two-dimensional, three-dimensional, and even cardiac strain images. These technologies are crucial in assessing how well each segment of the heart muscle contracts, especially in newborns, infants, children, teenagers, and even adults living with congenital heart disease. He notes that not all cardiologists are trained to interpret such complex cross-sectional images, but having this expertise allows for a much deeper and more accurate understanding of a child’s heart.

The ability to visualise the heart in three dimensions also enables doctors to plan safer and more personalised treatments. Newer technologies, such as photo-counting CT imaging, provide highly detailed 3D images while taking radiation exposure into careful consideration, which is especially important in paediatric cases. These developments help clinicians see small structures more clearly and support safer, more precise treatment planning.


Many congenital heart conditions, including Atrial Septal Defect, Patent Ductus Arteriosus, and Ventricular Septal Defect, can now be treated using minimally invasive percutaneous interventions. These procedures are performed through a small catheter inserted in the groin, typically take only a few hours, and allow children to return home within a couple of days, compared to the weeks required for recovery after open-heart surgery. After treatment, maintaining good oral hygiene and following endocarditis prevention advice are essential for long-term heart health.

Caring for a child with CHD requires immense patience and resilience. Many children face challenges such as feeding difficulties, slower growth, and frequent hospital visits. Dr Lim explains that even simple activities like drinking milk can be exhausting for these children, as they use a great deal of energy just to breathe. Parents must carefully manage medications, attend regular follow-ups, and balance work and financial responsibilities, making it a lifelong journey.

Despite technological progress, the emotional burden on families remains significant. Parents often blame themselves, wondering if something they did during pregnancy contributed to the condition. However, Dr Lim emphasises that most cases are genetic or occur by chance, with the risk increasing slightly to about two to three percent if a parent or sibling is affected. Emotional support from healthcare providers and other families plays a vital role, and parents are continually reminded that they are not alone. With proper care, most children can go on to live full and active lives.

This journey also creates a lasting bond between patients and their cardiologists, ensuring continuous care into adulthood. Children with congenital heart conditions require lifelong monitoring, and many patients continue seeing their cardiologists even decades later. Dr Lim reassures parents not to panic, noting that with early diagnosis and proper care, many heart defects can be effectively treated. He also highlights the importance of prevention and follow-up, including regular screenings and vaccinations to protect children from infections.

Malaysia’s healthcare system has made notable progress in paediatric cardiology, particularly with the introduction of advanced fetal echocardiography. This technology allows heart defects to be detected as early as 18 to 22 weeks of pregnancy, giving parents time to prepare and enabling doctors to plan for a safe delivery and immediate intervention if necessary. Early detection can make a critical difference in outcomes.

Looking ahead, Dr Lim remains optimistic about the future of paediatric cardiology in Malaysia. With more specialists being trained in advanced imaging and interventional techniques, the outlook continues to improve. Ultimately, at the heart of every medical breakthrough is a parent’s hope to see their child grow, laugh, and live life fully. Thanks to ongoing advancements, that hope is increasingly becoming a reality for children across the country.