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Atrial Septal Aneurysm
Paula J. Woodward, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Synonyms

                • Foramen ovale aneurysm
                • Aneurysm of septum primum
                • Redundant septum primum flap
              • Definitions

                • Redundant foramen ovale flap
                • Definition of redundancy varies between series
                  • Flap extends at least halfway across left atrium
                  • Flap excursion > 5 mm beyond plane of atrial septum
                  • Flap demonstrates abnormal mobility

              IMAGING

              • General Features

                • Imaging Recommendations

                  DIFFERENTIAL DIAGNOSIS

                    PATHOLOGY

                    • General Features

                      CLINICAL ISSUES

                      • Presentation

                        • Demographics

                          • Natural History & Prognosis

                            • Treatment

                              DIAGNOSTIC CHECKLIST

                              • Image Interpretation Pearls

                                Selected References

                                1. Santos AC et al: Fetal atrial septal aneurysm: a differential diagnosis of aortic arch retrograde flow. BMJ Case Rep. 13(1), 2020
                                2. Jaeggi E et al: Fetal and neonatal arrhythmias. Clin Perinatol. 43(1):99-112, 2016
                                3. Channing A et al: Maternal hyperoxygenation improves left heart filling in fetuses with atrial septal aneurysm causing impediment to left ventricular inflow. Ultrasound Obstet Gynecol. 45(6):664-9, 2015
                                4. Sun HY et al: Unusual consequence of a fetal atrial septal aneurysm. Clin Case Rep. 3(6):368-9, 2015
                                5. Bassareo PP et al: High prevalence of interatrial septal aneurysm in young adults who were born preterm. J Matern Fetal Neonatal Med. 27(11):1123-8, 2014
                                6. Yozgat Y et al: Importance of close follow-up in the fetus with premature atrial contractions accompanied by atrial septal aneurysm: a case report. Case Rep Obstet Gynecol. 2013:391085, 2013
                                7. Hung JH et al: Prenatal diagnosis of atrial septal aneurysm. J Clin Ultrasound. 36(1):51-2, 2008
                                8. Papa M et al: Prevalence and prognosis of atrial septal aneurysm in high risk fetuses without structural heart defects. Ital Heart J. 3(5):318-21, 2002
                                Related Anatomy
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                                Related Differential Diagnoses
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                                References
                                Tables

                                Tables

                                KEY FACTS

                                • Terminology

                                  • Imaging

                                    • Top Differential Diagnoses

                                      • Pathology

                                        • Clinical Issues

                                          • Diagnostic Checklist

                                            TERMINOLOGY

                                            • Synonyms

                                              • Foramen ovale aneurysm
                                              • Aneurysm of septum primum
                                              • Redundant septum primum flap
                                            • Definitions

                                              • Redundant foramen ovale flap
                                              • Definition of redundancy varies between series
                                                • Flap extends at least halfway across left atrium
                                                • Flap excursion > 5 mm beyond plane of atrial septum
                                                • Flap demonstrates abnormal mobility

                                            IMAGING

                                            • General Features

                                              • Imaging Recommendations

                                                DIFFERENTIAL DIAGNOSIS

                                                  PATHOLOGY

                                                  • General Features

                                                    CLINICAL ISSUES

                                                    • Presentation

                                                      • Demographics

                                                        • Natural History & Prognosis

                                                          • Treatment

                                                            DIAGNOSTIC CHECKLIST

                                                            • Image Interpretation Pearls

                                                              Selected References

                                                              1. Santos AC et al: Fetal atrial septal aneurysm: a differential diagnosis of aortic arch retrograde flow. BMJ Case Rep. 13(1), 2020
                                                              2. Jaeggi E et al: Fetal and neonatal arrhythmias. Clin Perinatol. 43(1):99-112, 2016
                                                              3. Channing A et al: Maternal hyperoxygenation improves left heart filling in fetuses with atrial septal aneurysm causing impediment to left ventricular inflow. Ultrasound Obstet Gynecol. 45(6):664-9, 2015
                                                              4. Sun HY et al: Unusual consequence of a fetal atrial septal aneurysm. Clin Case Rep. 3(6):368-9, 2015
                                                              5. Bassareo PP et al: High prevalence of interatrial septal aneurysm in young adults who were born preterm. J Matern Fetal Neonatal Med. 27(11):1123-8, 2014
                                                              6. Yozgat Y et al: Importance of close follow-up in the fetus with premature atrial contractions accompanied by atrial septal aneurysm: a case report. Case Rep Obstet Gynecol. 2013:391085, 2013
                                                              7. Hung JH et al: Prenatal diagnosis of atrial septal aneurysm. J Clin Ultrasound. 36(1):51-2, 2008
                                                              8. Papa M et al: Prevalence and prognosis of atrial septal aneurysm in high risk fetuses without structural heart defects. Ital Heart J. 3(5):318-21, 2002