| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Angiocardiography, negative contrast | Is a | Angiocardiography | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Is a | Diagnostic radiography with gas-air, negative contrast | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Procedure site | Heart structure | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Approach | Transvascular approach | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Method | Injection - action | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Method | Imaging - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Method | Radiographic imaging - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Direct substance | Negative contrast media | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Method | Measurement - action | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Method | Investigation - action | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Has intent | Diagnostic intent | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Procedure site | Blood vessel structure | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Procedure site | Cardiac structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Procedure site | Structure of cardiovascular system | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Direct substance | Radiographic contrast media | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Method | Radiographic imaging - action | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Procedure site | Blood vessel structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Method | Radiographic imaging - action | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Is a | Thoracic contrast procedure | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Is a | Radiographic procedure on cardiovascular system | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Method | Imaging - action | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Procedure site - Direct | Heart structure | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Is a | Angiography | false | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Is a | Negative contrast cardiac roentgenography | true | Inferred relationship | Existential restriction modifier |  |  | 
| Angiocardiography, negative contrast | Using substance | Negative contrast media | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Using substance | Negative contrast media | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Procedure site - Direct | Blood vessel structure | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Method | Radiographic imaging - action | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Angiocardiography, negative contrast | Method | Radiographic imaging - action | true | Inferred relationship | Existential restriction modifier | 2 |  | 
| Angiocardiography, negative contrast | Is a | Angiocardiography, positive contrast | true | Inferred relationship | Existential restriction modifier |  |  |