Fetal Echocardiography

Congenital heart defects are the most common type of major birth anomaly, affecting approximately 1% of all infants. A fetal echocardiogram is the specialized clinical tool used to detect these issues during pregnancy. It utilizes high-resolution ultrasound combined with advanced Color and Pulsed-Wave Doppler to visualize the flow of blood through the baby's heart in minute detail.

In our Unit, a fetal echo is far more extensive than a routine 'heart check.' We meticulously examine horizontal and sagittal views to verify:

• The Great Vessels: Ensuring the aorta and pulmonary arteries are not transposed or narrowed.
• Valve Function: Checking for leakages or obstructions that could indicate valvular heart disease.
• Fetal Electrophysiology: Measuring the relationship between the upper and lower heart chambers to rule out life-threatening arrhythmias.

By using a systematic approach, our subspecialists can provide a level of cardiac detail that is necessary for babies who require the highest standard of care.

Universal heart screening is part of every 20-week scan, but a fetal echocardiogram is specifically recommended for patients where the statistical risk of a defect is higher:

• Maternal Medical Conditions: Pre-existing Type 1 or Type 2 Diabetes (which carries a higher risk for heart issues), and autoimmune disorders like Systemic Lupus (SLE) or Sjögren's syndrome, which can affect the fetal heart rhythm.
• The IVF Factor: Pregnancies conceived via In-Vitro Fertilization (IVF) are statistically linked to a slightly higher incidence of heart defects.
• Early Markers: If your 12-week scan showed an increased Nuchal Translucency (NT) measurement above 3.5mm, a fetal echocardiogram is mandatory, even if the chromosomal results were normal.
• Suspected Findings: If a regular sonographer had difficulty seeing the heart or suspected an abnormality, we provide the expert 'second opinion' needed to confirm or rule out a diagnosis.

The fetal heart is roughly the size of a walnut and beats between 120 and 160 times per minute. Assessing this complex, rapidly moving structure requires significant time and subspecialty expertise. The scan is typically performed between 20 and 24 weeks when the heart is large enough for detailed mapping.

During a 45-to-60 minute evaluation, we perform:

• Situs Assessment: Verifying the heart is on the correct side (levocardia) and that the stomach and liver are correctly positioned in relation to the heart.
• The Outflow Tract Survey: Visualizing the 'crossing' of the major arteries, which is where many critical defects occur.
• Functional Doppler: Assessing the pressure of blood as it moves through the valves to ensure the heart isn't working too hard or failing.

At the MFM Unit, we prioritize 'Quality of View'—ensuring that every angle is captured to satisfy international diagnostic protocols (like ISUOG guidelines).

The primary clinical power of a fetal echocardiogram lies in the Preparation for Birth. If a heart defect is identified, we don't just provide a diagnosis; we provide a care path:

1. Expert Explanation: We use anatomical diagrams and models to help you understand the defect and exactly what needs to be fixed.
2. The Cardiac Multi-Disciplinary Team (MDT): We coordinate your care with Mediclinic's pediatric cardiologists and neonatal surgeons. This means the surgeons who will treat your baby after birth are part of the team *before* the birth.
3. Safe Delivery Planning: Some heart defects require immediate medication (like Prostaglandin) or surgery within hours of birth. We ensure you deliver in a hospital with a Level III NICU and a pediatric cardiac team standby, avoiding the dangerous risks associated with emergency postnatal transfers.

Knowing about a heart condition before birth is the single most important factor in a successful outcome. Babies with critical heart defects diagnosed *prenatally* have significantly better survival rates and higher cognitive outcomes than those diagnosed only after birth.

Early detection allows us to transition from a 'crisis' at birth to a 'planned' stabilization. For many families, the outcome of a fetal echo is also the best kind of news: the definitive 'all clear' after a routine scan has raised a concern. Whether the heart is healthy or requires intervention, the clarity provided by a subspecialist allows you to proceed through your pregnancy with a factual, evidence-based plan.

If you have maternal diabetes, an IVF pregnancy, or a family history of heart defects, you should seek a referral to the Maternal Fetal Medicine Unit for a fetal echocardiogram between 20 and 24 weeks.

If you have been told that a routine 20-week scan found a 'soft marker' in the heart (EIF) or that there was a 'suspicion of a defect,' an expert second opinion from a certified fetal cardiologist is essential. We serve as the UAE's primary referral hub for complex fetal heart issues, providing the subspecialty precision required to help families navigate the most challenging cardiac diagnoses.