| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Closure of atrial septal defect using sutures | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Closure of atrial septal defect using fluoroscopic guidance (procedure) | Procedure site - Direct (attribute) | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Lutembacher's syndrome | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Closure of atrial septal defect using fluoroscopic guidance (procedure) | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Closure of atrial septal defect using septal occluder device | Procedure site - Direct (attribute) | False | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Revision of closure of defect of interatrial septum | Procedure site - Direct (attribute) | False | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Repair of total anomalous pulmonary venous connection by unroofing and closure of coronary sinus and interatrial communication (procedure) | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Closure of atrial septal defect using septal occluder device | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Fallot's trilogy | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Repair of partial anomalous pulmonary venous connection by unroofing of coronary sinus with patch closure of interatrial communication (procedure) | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Repair of partial anomalous pulmonary venous connection by unroofing of coronary sinus with patch closure of interatrial communication (procedure) | Procedure site - Direct (attribute) | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Abnormality of atrial septum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Fallot's trilogy | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Pentalogy of Fallot (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Thickened atrial septum (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Spontaneous closure of atrial component of atrioventricular septal defect (finding) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Restrictive interatrial communication (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Nonrestrictive interatrial communication (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Atrioventricular septal defect - isolated atrial component | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Atrial septum intact (finding) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Congenital abnormality of atrial septum (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Ostium secundum type atrial septal defect | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Residual interatrial communication (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Malattachment of atrial septum with posterior aspect of septum primum to left (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Interatrial communication through coronary sinus orifice (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Restrictive interatrial communication with obligatory shunt (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Malattachment of atrial septum with superior aspect of septum primum to left and posterior (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Malattachment of atrial septum (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Excessive restriction of interatrial communication as complication of procedure | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Infective endocarditis at site of interatrial communication (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Abscess at site of interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Spontaneous closure of acquired interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Spontaneous closure of residual interatrial communication (finding) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Infective endocarditis at site of patch of interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Lipomatous hypertrophy of interatrial groove | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Acquired interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Surgically constructed interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Recurrent interatrial communication after prior cardiovascular surgical procedure | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Recurrent atrial component of atrioventricular septal defect after prior cardiovascular surgical procedure | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Acquired excessive restriction of interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Excessive restriction of interatrial communication as complication of procedure | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Spontaneous closure of surgically created fenestration of interatrial septum after prior atrial fenestration operation | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Congenital abnormality of atrial septum (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Atrial septal defect through coronary sinus orifice | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Malattachment of atrial septum with superior aspect of septum primum to left and posterior (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Malattachment of atrial septum with posterior aspect of septum primum to left (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Malattachment of atrial septum (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Ebstein's anomaly with atrial septal defect | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Restrictive interatrial communication with obligatory shunt (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Ostium primum defect | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Double outlet right atrium | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Malaligned atrial septum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Interatrial communication through coronary sinus orifice (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Lutembacher's syndrome | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Atrial septal defect with endocardial cushion defect, partial type | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Persistent ostium secundum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Congenital atrial septal defect (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Double outlet left atrium | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Atrioventricular septal defect - isolated atrial component | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Cor triloculare biventriculare (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Common atrioventricular canal | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Closure of coronary sinus atrial septal defect | Procedure site - Direct (attribute) | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Ostium primum defect | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Atrial septal defect with endocardial cushion defect, partial type | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 6 | 
| Persistent ostium secundum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Malaligned atrial septum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Double outlet right atrium | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Double outlet left atrium | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 6 | 
| Patching of coronary sinus atrial septal defect | Procedure site - Direct (attribute) | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Congenital atrial septal defect (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Interatrial communication through coronary sinus orifice (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 6 | 
| Restrictive interatrial communication with obligatory shunt (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Atrial septal defect with endocardial cushion defect, partial type | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Persistent ostium secundum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Malaligned atrial septum | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Double outlet right atrium | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Congenital atrial septal defect (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Restrictive interatrial communication with obligatory shunt (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Double outlet left atrium | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Interatrial communication through coronary sinus orifice (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 5 | 
| Lutembacher's syndrome | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 6 | 
| Lutembacher's syndrome | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 7 | 
| Ostium primum defect | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 6 | 
| Lymphedema, atrial septal defect, facial changes syndrome (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 4 | 
| Acquired atrial septal defect (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Atrial septal defect, atrioventricular conduction defect syndrome (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Atrial septal defect, atrioventricular conduction defect syndrome (disorder) | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Residual interatrial communication following procedure (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Recurrent interatrial communication following procedure (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Pericarditis associated with atrial septal defect | Finding site | False | Interatrial septum structure | Inferred relationship | Some | 3 | 
| Surgically constructed interatrial communication | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Lymphedema, atrial septal defect, facial changes syndrome (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Atrial septal defect, atrioventricular conduction defect syndrome (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Fallot's trilogy | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Double outlet right atrium | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Therapeutic transcatheter insertion of interatrial shunt (procedure) | Procedure site - Indirect (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Common atrium with common atrioventricular junction (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Common atrium with separate arterioventricular junctions (disorder) | Finding site | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Repair of supracristal defect with tissue graft | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 2 | 
| Insertion of interatrial baffle | Procedure site - Indirect (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 1 | 
| Closure of atrial septal defect using robotic assistance (procedure) | Procedure site - Direct (attribute) | True | Interatrial septum structure | Inferred relationship | Some | 1 |