| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Electrocardiographic ST segment changes | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Prolonged ST segment | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Heart disease | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Ventricular inversion | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Reverse split of second heart sound | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram finding of ischemia | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Resuscitation by cardiac cardioversion | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Decreased electrocardiogram voltage | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Heart murmur, categorized by configuration | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Continuous murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Inverted T wave | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Functional heart murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Chronic myocarditis due to rheumatic heart disease | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Counterclockwise vectorcardiographic loop | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Pancarditis | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Magnetic resonance imaging of myocardium | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Cardiac murmur, intensity grade VI/VI | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Digitalis toxicity by electrocardiogram | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Radioisotope myocardial imaging procedure | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 2 | 
| Normal sinus rhythm | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram finding of infarction | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Late systolic murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Donor cardiectomy with preparation and maintenance of homograft | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 2 | 
| Check artificial pacemaker by slew rate check | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Flattened T wave | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Abnormal third heart sound, S>3< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Radionuclide study of cardiac output | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Mid-systolic murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Insertion of permanent transvenous electrodes | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Replacement of electronic heart device, myocardial electrode | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Shortened ST interval | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Cardiac resuscitation | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Pansystolic murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Dilated cardiomyopathy caused by drug | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Inferior myocardial infarction on electrocardiogram | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Cardiac external resuscitation by massage with open chest | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Cardiac external resuscitation by massage with open chest | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Posterior myocardial infarction on electrocardiogram | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Angiocardiography by serialography, single plane | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Organic heart murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Dropped beat | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Abnormal first heart sound, S>1< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| ST segment elevation | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Accentuated split of second heart sound, S>2< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Complication of transplanted heart | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Normal heart rate | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Ejection murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Revision of permanent cardiac pacemaker device | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Shortened QT interval | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Doppler flow mapping of heart | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ayerza's syndrome | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Mid-diastolic murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Loud first heart sound | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Angiocardiography of right heart | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Palpitations | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Crescendo-decrescendo cardiac murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Diminished split of second heart sound, S>2< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Abnormal second heart sound, S>2< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Opening snap | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Cor pulmonale | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Reversed split of first heart sound, S>1< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Laceration of heart with penetration of heart chambers | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 4 | 
| Dextrocardia/situs inversus finding | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Abnormal fourth heart sound, S>4< | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Lateral infarction by EKG | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Chronic rheumatic heart disease | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Heart murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Replacement of temporary transvenous pacemaker system | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Chronic valvulitis due to rheumatic heart disease | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Check artificial pacemaker for voltage threshold | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Decrescendo cardiac murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Early systolic murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Replacement of electronic heart device, transvenous electrode | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Neoplasm of uncertain behavior of heart | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Occult heartworm disease, infection by Dirofilaria immitis without signs of heartworm disease | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Sudden cardiac death | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Early diastolic murmur | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Wide QRS complex | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| No palpitations | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiographic myocardial ischemia | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no myocardial ischemia | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram shows myocardial ischemia | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiographic myocardial infarction | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no myocardial infarction | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiographic old myocardial infarction | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Anteroseptal infarction on electrocardiogram | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiographic posterior/inferior infarct | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiographic subendocardial infarct | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Lateral infarction on electrocardiogram | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no left ventricle hypertrophy | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no right ventricle hypertrophy | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no ectopic beats | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Supraventricular arrhythmia absent on electrocardiogram | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no ventricular arrhythmia | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Electrocardiogram: no heart block | Finding site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Soft tissue X-ray heart | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 2 | 
| Fluoroscopy -heart/mediastinum | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fluoroscopy and radiography - heart | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fluoroscopy and radiography - mediastinum | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier |  | 
| Cineradiography - heart | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 | 
| Kymography - heart | Procedure site | False | Cardiac structure | Inferred relationship | Existential restriction modifier | 1 |