CTICasesInteratrial Septal Aneurysm with Patent Foramen Ovale
Imaging findings
Chest CT shows contrast material crossing from the left atrium to the right atrium through the interatrial septum, mimicking a large secundum atrial septal defect. However, the right heart chambers and right ventricular wall are normal in size and thickness, and detailed assessment reveals an interatrial septal aneurysm associated with two tiny patent foramen ovales.
Key takeaways
Interatrial septal aneurysms can mimic large atrial septal defects on routine chest CT due to transient contrast jetting. Checking the right heart for enlargement or hypertrophy can prevent over-diagnosing large shunts, as these aneurysms are often asymptomatic or associated only with small patent foramen ovales causing clinically insignificant shunting.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Lobar Pneumonia due to NocardiaInfection
- Birt-Hogg-Dubé SyndromeCongenital
- Bronchogenic CystCongenital
- Esophageal LeiomyomaNeoplastic
- Esophageal Intramural HematomaIatrogenic
- Birt-Hogg-Dubé Syndrome (Severe Presentation)Congenital
- Isolated Systemic Arterial Supply to the LungCongenital
- Quadricuspid Aortic ValveCongenital
See all cases from February 3, 2017 →
Related Congenital cases
- Left Upper Lobe Partial Anomalous Pulmonary Venous Return
- Crisscross Pulmonary Arteries in Repaired Tetralogy of Fallot
- Pulmonary Arteriovenous Malformation in Hereditary Hemorrhagic Telangiectasia
- Congenital Unilateral Pulmonary Vein Atresia
- Congenital Absence of the Intrahepatic Inferior Vena Cava (IVC)
- Congenital Lymphangiomatosis