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The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
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Related Experiment Video

Updated: Jun 2, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure

Published on: February 8, 2022

Bilateral aortico-atrial tunnels.

Cilian OMaoldomhnaigh¹, James M Ramsay, John P Finley

¹Department of Pediatric Cardiology, Princess Margaret Hospital for Children, Roberts Road, Perth, WA, 6008, Australia.

Pediatric Cardiology

|April 19, 2011

Summary

This study details the surgical repair of two rare aortico-atrial tunnels in an 8-year-old boy. The successful correction ensured the child remained asymptomatic following the intervention.

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Area of Science:

Cardiovascular Surgery
Congenital Heart Defects
Pediatric Cardiology

Background:

Aortico-atrial tunnels are rare congenital abnormalities where abnormal connections form between the aorta and the atria.
These anomalies can lead to significant hemodynamic disturbances and require timely surgical intervention.

Observation:

An 8-year-old asymptomatic male patient presented with two distinct aortico-atrial tunnels.
The tunnels originated from the noncoronary sinus of Valsalva and extended to both the left and right atria.

Findings:

Diagnostic investigations confirmed the presence and extent of the dual aortico-atrial tunnels.
Surgical correction was successfully performed, addressing both abnormal connections.

Implications:

This case highlights the importance of accurate diagnosis and surgical management of rare congenital cardiovascular anomalies.
Successful surgical correction can lead to excellent long-term outcomes in pediatric patients with aortico-atrial tunnels.