Which are the symptoms of Truncus Arteriosus?

Truncus arteriosus is a rare congenital heart defect where a single large blood vessel fails to separate into the aorta and pulmonary artery, leading to significant mixing of oxygen-rich and oxygen-poor blood. Common symptoms include rapid breathing, bluish skin discoloration (cyanosis), excessive sweating, and failure to thrive, typically manifesting within the first few days of life.

What are the primary symptoms of Truncus Arteriosus?

Because Truncus arteriosus forces the heart to pump blood to both the lungs and the body through a single vessel, the most frequent clinical presentation involves signs of heart failure and pulmonary over-circulation. Infants with Truncus arteriosus often exhibit the following clinical signs:

• Rapid, labored breathing (tachypnea): The body struggles to compensate for low oxygen levels.


• Cyanosis: A bluish tint to the skin, lips, or fingernails caused by deoxygenated blood circulating through the body.


• Poor feeding and weight gain: Infants may tire easily during feedings, leading to failure to thrive.


• Congestive heart failure symptoms: Including excessive sweating (especially during feeding), irritability, and lethargy.


• Heart murmur: Often detected during routine newborn physical examinations.

How does Truncus Arteriosus affect daily life?

The severity of Truncus arteriosus symptoms can vary based on the amount of blood flowing to the lungs. If too much blood reaches the lungs, the infant faces pulmonary hypertension, which places immense stress on the heart. Over time, if untreated, Truncus arteriosus leads to irreversible damage to the pulmonary blood vessels. While surgical repair is the standard of care, long-term monitoring is essential as patients may face residual issues such as valve regurgitation or the need for future conduit replacements.

When should you seek emergency medical attention?

Immediate medical intervention is required if an infant shows signs of severe respiratory distress, such as nasal flaring, grunting, or retractions (skin pulling in between ribs). If a child with Truncus arteriosus becomes excessively lethargic, shows sudden worsening of cyanosis, or appears unresponsive, seek emergency pediatric cardiac care immediately.

Next steps

• Consult a pediatric cardiologist to establish a long-term cardiac surveillance plan.


• Connect with the 105 members in the Truncus arteriosus community at DiseaseMaps.org to share experiences and support.


• Ensure regular follow-ups to monitor for potential arrhythmias or valve dysfunction.

Medical disclaimer: This information is for educational purposes and does not replace professional medical advice, diagnosis, or treatment from your healthcare provider.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Truncus Arteriosus


• Orphanet: Common arterial trunk


• American Heart Association: Congenital Heart Defects - Truncus Arteriosus


• OMIM (Online Mendelian Inheritance in Man): Truncus Arteriosus, Persistent