| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Phonocardiogram with ECG lead | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| standard-EKG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Ambulatory ECG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Percutaneous transluminal mapping of conducting system of heart | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Percutaneous transluminal electrophysiological studies on conducting system of heart | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| elektrokardiografisk åtgärd och/eller belastningstest | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Intracardiac electrophysiologic procedure with ECG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| 24 Hour ECG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| ECG ST segment monitoring | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| ECG automated dysrhythmia monitoring | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Ellestad protocol | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Ramp protocol | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Pepper protocol | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, intracardiac, His bundle recording | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, single lead | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Tilt table test | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Left ventricular recording | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Cardiac mapping | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Stimulation of carotid sinus with simultaneous electrocardiographic monitoring (procedure) | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with maximal exercise test | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Cardiovascular stress test using bicycle ergometer | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiographic procedure | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Bundle of His recording (procedure) | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Monitoring of cardiac output by ECG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with sub-maximal exercise test | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Signal-averaged electrocardiography | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Continuous electrocardiogram | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram monitoring, 10 hour portrait | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Masters' stress test, two-step | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with exercise test | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiographic monitoring | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, esophageal lead | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, intracardiac | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiographic recording from artificial pacemaker | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, rhythm | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Right ventricular recording | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with vectorcardiogram | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Vectorcardiogram | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Fetal electrocardiogram | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Cardiovascular stress test using treadmill | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Phonocardiogram with ECG lead, interpretation and report | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Cardiac electrophysiologic stimulation and recording study | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Tracing of carotid pulse with ECG lead | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Monitoring of ECG, pressure, blood gases and cardiac output | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Apexcardiogram with ECG lead | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Intra-atrial recording | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Intraoperative cardiac pacing and mapping | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Monitoring of ECG and pressure during major surgery | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Monitoring of ECG at surgery | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| EKG, allmänt | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| förbättrat EKG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| EKG, inga nya förändringar | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Continuous ECG monitoring | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| 12 lead ECG | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram - general - NOS | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiography NOS | Using | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Phonocardiogram with ECG lead | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| elektrokardiografisk åtgärd och/eller belastningstest | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Intracardiac electrophysiologic procedure with ECG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Ellestad protocol | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Ramp protocol | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Pepper protocol | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, intracardiac, His bundle recording | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, single lead | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Tilt table test | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Left ventricular recording | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| EKG, allmänt | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| standard-EKG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Ambulatory ECG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| förbättrat EKG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| EKG, inga nya förändringar | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram - general - NOS | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiography NOS | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Percutaneous transluminal mapping of conducting system of heart | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Percutaneous transluminal electrophysiological studies on conducting system of heart | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Cardiac mapping | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Stimulation of carotid sinus with simultaneous electrocardiographic monitoring (procedure) | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with maximal exercise test | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| 24 Hour ECG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Cardiovascular stress test using bicycle ergometer | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Continuous ECG monitoring | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| 12 lead ECG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| ECG ST segment monitoring | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| ECG automated dysrhythmia monitoring | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiographic procedure | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Bundle of His recording (procedure) | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Monitoring of cardiac output by ECG | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with sub-maximal exercise test | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Signal-averaged electrocardiography | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Continuous electrocardiogram | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram monitoring, 10 hour portrait | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Masters' stress test, two-step | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with exercise test | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiographic monitoring | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, esophageal lead | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, intracardiac | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiographic recording from artificial pacemaker | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram, rhythm | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Right ventricular recording | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Electrocardiogram with vectorcardiogram | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  | 
| Vectorcardiogram | Direct device | False | Electrocardiographic monitor and recorder | Inferred relationship | Some |  |