Congenital Heart Disease (CHD), known locally as Penyakit Jantung Bawaan (PJB), remains a significant challenge for the Indonesian healthcare system, acting as a leading cause of neonatal mortality. While the precise etiology of most CHD cases remains elusive, medical experts emphasize that identifying and mitigating specific risk factors during pregnancy is the most effective strategy for reducing the incidence of these conditions. Dr. Rizky Adriansyah, MKed, a specialist in pediatric cardiology and the Chairperson of the Cardiology Coordination Unit of the Indonesian Pediatric Society (IDAI), recently highlighted the critical intersection between prenatal care and cardiac health during a comprehensive webinar focused on the welfare of Indonesian children.
According to Dr. Rizky, the development of the fetal heart is a complex process that occurs very early in pregnancy, often before a woman even realizes she is pregnant. Because the exact cause of CHD is frequently unknown, the medical community focuses on "risk factors"—conditions or exposures that increase the likelihood of a defect without necessarily being the sole direct cause. In recent medical literature, three primary factors have emerged as significant contributors to the disruption of fetal cardiac development: maternal infections, nutritional deficiencies, and exposure to certain medications.
Primary Risk Factors and Preventative Strategies
One of the most prominent risk factors discussed by Dr. Rizky is infection with the Rubella virus, also known as German measles. When a pregnant woman contracts Rubella, particularly during the first trimester, the virus can cross the placenta and interfere with the development of the fetus’s organs, including the heart. This condition, known as Congenital Rubella Syndrome (CRS), often results in various defects, such as patent ductus arteriosus or pulmonary artery stenosis. To combat this, health authorities emphasize the importance of the MR (Measles and Rubella) vaccine. Dr. Rizky noted that ensuring women are vaccinated before pregnancy is a cornerstone of CHD prevention, as it provides a protective barrier against infections that could otherwise lead to irreversible structural damage in the womb.
Nutritional status, specifically the intake of folic acid (Vitamin B9), is another critical variable. Folic acid plays a vital role in DNA synthesis and repair, as well as the formation of the neural tube and the cardiovascular system. A deficiency in this essential nutrient during the early stages of gestation is strongly linked to an increased risk of heart defects. Consequently, medical practitioners urge expectant mothers to consume folic acid-rich foods and supplements as part of their prenatal regimen. This nutritional intervention is most effective when started prior to conception, ensuring that the body has adequate levels during the crucial weeks of organogenesis.
Furthermore, the consumption of specific medications during pregnancy can act as a teratogen, an agent that causes malformation of an embryo. Dr. Rizky specifically pointed to anti-seizure medications (anticonvulsants) as a high-risk category. Women with chronic conditions like epilepsy must work closely with their neurologists and obstetricians to manage their treatment plans, potentially adjusting dosages or switching to safer alternatives to minimize the risk to the developing fetus.
While traditional lifestyle factors such as smoking and alcohol consumption remain recognized risks, Dr. Rizky clarified that the epidemiology of CHD is complex. Many cases involve mothers who lived healthy lifestyles and avoided tobacco and alcohol, yet still gave birth to children with heart defects. This reality underscores the fact that CHD can occur across all demographics, necessitating a universal approach to screening and awareness rather than focusing solely on "high-risk" lifestyle groups.
The Statistical Landscape of CHD in Indonesia
The urgency of addressing CHD is reflected in sobering mortality statistics. In Indonesia, data from 2017 indicates that CHD is the second-largest contributor to neonatal deaths, accounting for approximately 17 percent of fatalities in the first month of life. It follows only prematurity in terms of its impact on infant survival rates. Globally, the World Health Organization (WHO) estimates that one out of every 100 newborns is born with some form of CHD. Of these cases, roughly 25 percent are classified as "critical CHD," meaning they require surgical intervention or catheterization within the first year—and often the first month—of life to ensure survival.
In the Indonesian context, this translates to an estimated birth rate of two to four infants with critical CHD per 1,000 live births. Despite the prevalence of the condition, Dr. Rizky revealed a troubling gap in treatment: less than 50 percent of CHD cases in Indonesia are currently being handled or treated effectively. This disparity is not the result of a single failure but a combination of systemic issues, including geographical barriers to specialized care, a shortage of pediatric cardiologists and cardiovascular surgeons, and a lack of advanced diagnostic equipment in rural areas.
Overcoming Barriers to Diagnosis and Treatment
The "diagnostic gap" is perhaps the most significant hurdle in the fight against CHD-related mortality. In many regions of Indonesia, children with heart defects are not diagnosed until their condition has progressed to a critical stage, or worse, they pass away without the cause ever being identified. Dr. Rizky emphasized that delays in diagnosis are often fatal.
To bridge this gap, the medical community is advocating for the adoption of simple, cost-effective screening methods that can be implemented even in resource-limited settings. One such method is pulse oximetry screening. This non-invasive test measures the oxygen saturation in a newborn’s blood. By placing sensors on the baby’s right hand and either foot, healthcare providers can detect "silent" heart defects that do not immediately present with obvious symptoms like cyanosis (blue-tinted skin). This test is highly sensitive, takes less than five minutes, and can be performed by midwives or general practitioners at primary health centers (Puskesmas).
If a screening indicates a potential issue, more advanced diagnostic tools such as echocardiography (an ultrasound of the heart) are utilized. However, the availability of echocardiography is often limited to tertiary hospitals in major cities. Dr. Rizky pointed out that increasing the number of trained medical personnel who can perform and interpret these tests is essential for improving survival rates nationwide.
Recognizing Symptoms and the Role of Primary Care
For parents and frontline healthcare workers, recognizing the clinical signs of CHD is vital. Symptoms can vary depending on the severity of the defect but often include:
- Poor Weight Gain: Infants with CHD often tire easily while feeding, leading to inadequate caloric intake and slow growth.
- Respiratory Distress: Fast or labored breathing, even when the infant is at rest.
- Cyanosis: A bluish tint to the lips, tongue, or nail beds, indicating low oxygen levels.
- Heart Murmurs: Unusual sounds heard through a stethoscope during a routine check-up.
Dr. Rizky noted that while a heart murmur is a common sign, not all murmurs indicate a defect, and not all defects produce a murmur. Therefore, any suspicion of a cardiac issue should be followed by a formal evaluation. Critical CHD is often detectable within the first 24 to 48 hours of life or during the first week, making the postnatal period a window of opportunity for life-saving intervention.
The role of midwives (bidan) in Indonesia is particularly crucial. As the primary birth attendants for a large portion of the population, midwives are in a unique position to perform early screenings. Dr. Rizky urged healthcare providers at the village and sub-district levels to be proactive. By integrating pulse oximetry into routine newborn care, the medical community can identify at-risk infants before they leave the birthing facility.
Public Education and Future Implications
In addition to clinical improvements, public education is a vital pillar of the strategy to combat CHD. To this end, Dr. Rizky highlighted the educational resources available on the "Sehatkan Jantung Anak Indonesia" (Healthy Indonesian Children’s Hearts) YouTube channel. This platform provides accessible information for parents and healthcare workers alike, demonstrating how to conduct screenings and what signs to look for in a newborn.
The implications of failing to address CHD are profound. Beyond the tragic loss of life, untreated heart defects place a significant emotional and economic burden on families and the state. Children with undiagnosed CHD who survive into childhood often face chronic health issues, reduced quality of life, and frequent hospitalizations. Conversely, when CHD is detected early, many defects can be corrected through surgery or minimally invasive procedures, allowing children to lead full, healthy lives.
As Indonesia continues to develop its healthcare infrastructure, the focus on pediatric cardiology must remain a priority. This involves not only investing in technology and specialized training but also fostering a culture of awareness where every parent understands the importance of prenatal health and every newborn receives a basic cardiac screening. The goal, as articulated by Dr. Rizky and the IDAI, is to ensure that no child’s potential is cut short by a condition that could have been detected and treated. Through a combination of vaccination, nutrition, early screening, and expanded access to care, Indonesia can move toward a future where CHD is no longer a leading cause of neonatal death.
