Communication of the coronary sinus with both atria

Area of Science:

• Cardiovascular anatomy
• Congenital heart anomalies
• Medical imaging and diagnostics

Background:

• The coronary sinus (CS) is a major vein that collects deoxygenated blood from the heart muscle.
• Anomalies of the CS can lead to complex cardiovascular presentations.
• Accurate anatomical understanding is vital for surgical and interventional procedures.

Observation:

• A rare coronary sinus anomaly was identified in an 18-year-old male with a skull fracture.
• This anomaly presented as a direct communication between the coronary sinus and both the right and left atria.
• The patient had no reported pre-existing cardiac conditions.

Findings:

• The anomalous coronary sinus effectively functioned as an atrial septal defect (ASD).
• This anatomical variation can lead to intracardiac shunting of blood between the atria.
• The right atrium appeared morphologically normal despite the interatrial communication.

Implications:

• Recognition of this coronary sinus anomaly is critical for accurate diagnosis of interatrial shunts.
• It highlights the importance of comprehensive cardiac evaluation, even with a seemingly normal right atrium.
• This finding may influence treatment strategies for patients with complex congenital heart disease and shunting.