| NDT | non-diagnostic T abnormalities | 1.0 | 1.0 | | STTC | STTC | other ST-T descriptive statements | non-diagnostic T abnormalities | | | | |
| NST_ | non-specific ST changes | 1.0 | 1.0 | | STTC | NST_ | Basic roots for coding ST-T changes and abnormalities | non-specific ST changes | 145 | MDC_ECG_RHY_STHILOST | | |
| DIG | digitalis-effect | 1.0 | 1.0 | | STTC | STTC | other ST-T descriptive statements | suggests digitalis-effect | 205 | | | |
| LNGQT | long QT-interval | 1.0 | 1.0 | | STTC | STTC | other ST-T descriptive statements | long QT-interval | 148 | | | |
| NORM | normal ECG | 1.0 | | | NORM | NORM | Normal/abnormal | normal ECG | 1 | | | F-000B7 |
| IMI | inferior myocardial infarction | 1.0 | | | MI | IMI | Myocardial Infarction | inferior myocardial infarction | 161 | | | |
| ASMI | anteroseptal myocardial infarction | 1.0 | | | MI | AMI | Myocardial Infarction | anteroseptal myocardial infarction | 165 | | | |
| LVH | left ventricular hypertrophy | 1.0 | | | HYP | LVH | Ventricular Hypertrophy | left ventricular hypertrophy | 142 | | C71076 | |
| LAFB | left anterior fascicular block | 1.0 | | | CD | LAFB/LPFB | Intraventricular and intra-atrial Conduction disturbances | left anterior fascicular block | 101 | MDC_ECG_BEAT_BLK_ANT_L_HEMI | C62267 | D3-33140 |
| ISC_ | non-specific ischemic | 1.0 | | | STTC | ISC_ | Basic roots for coding ST-T changes and abnormalities | ischemic ST-T changes | 226 | | | |
| IRBBB | incomplete right bundle branch block | 1.0 | | | CD | IRBBB | Intraventricular and intra-atrial Conduction disturbances | incomplete right bundle branch block | 105 | MDC_ECG_BEAT_RBB_BLK_INCOMP | C71048 | D3-33112 |
| 1AVB | first degree AV block | 1.0 | | | CD | _AVB | Sinus node dysfunction, atrial and AV-conduction defects | first degree AV block | | MDC_ECG_RHY_AV_HEART_BLK_DEG_1 | C111088 | |
| IVCD | non-specific intraventricular conduction disturbance (block) | 1.0 | | | CD | IVCD | Intraventricular and intra-atrial Conduction disturbances | non-specific intraventricular conduction disturbance | 107 | MDC_ECG_BEAT_BLK_IVCD | C62271 | D3-33000 |
| ISCAL | ischemic in anterolateral leads | 1.0 | | | STTC | ISCA | ischemic ST-T changes | in anterolateral leads | | | | |
| CRBBB | complete right bundle branch block | 1.0 | | | CD | CRBBB | Intraventricular and intra-atrial Conduction disturbances | (complete) right bundle branch block | 106 | MDC_ECG_BEAT_RBB_BLK_COMP | C62270 | D3-33110 |
| CLBBB | complete left bundle branch block | 1.0 | | | CD | CLBBB | Intraventricular and intra-atrial Conduction disturbances | (complete) left bundle branch block | 104 | MDC_ECG_BEAT_LBB_BLK_COMP | C62269 | D3-33120 or 122752 |
| ILMI | inferolateral myocardial infarction | 1.0 | | | MI | IMI | Myocardial Infarction | inferolateral myocardial infarction | | | | |
| LAO/LAE | left atrial overload/enlargement | 1.0 | | | HYP | LAO/LAE | Atrial statements | left atrial overload/enlargement | 140 | | | |
| AMI | anterior myocardial infarction | 1.0 | | | MI | AMI | Myocardial Infarction | anterior myocardial infarction | 160 | | | |
| ALMI | anterolateral myocardial infarction | 1.0 | | | MI | AMI | Myocardial Infarction | anterolateral myocardial infarction | | | | |
| ISCIN | ischemic in inferior leads | 1.0 | | | STTC | ISCI | ischemic ST-T changes | in inferior leads | | | | |
| INJAS | subendocardial injury in anteroseptal leads | 1.0 | | | MI | AMI | ischemic ST-T changes compatible with subendocardial injury | in anteroseptal leads | | | | |
| LMI | lateral myocardial infarction | 1.0 | | | MI | LMI | Myocardial Infarction | lateral myocardial infarction | 163 | | | |
| ISCIL | ischemic in inferolateral leads | 1.0 | | | STTC | ISCI | ischemic ST-T changes | in inferolateral leads | | | | |
| LPFB | left posterior fascicular block | 1.0 | | | CD | LAFB/LPFB | Intraventricular and intra-atrial Conduction disturbances | left posterior fascicular block | 102 | MDC_ECG_BEAT_BLK_POS_L_HEMI | C62268 | D3-33150 |
| ISCAS | ischemic in anteroseptal leads | 1.0 | | | STTC | ISCA | ischemic ST-T changes | in anteroseptal leads | | | | |
| INJAL | subendocardial injury in anterolateral leads | 1.0 | | | MI | AMI | ischemic ST-T changes compatible with subendocardial injury | in anterolateral leads | | | | |
| ISCLA | ischemic in lateral leads | 1.0 | | | STTC | ISCA | ischemic ST-T changes | in lateral leads | | | | |
| RVH | right ventricular hypertrophy | 1.0 | | | HYP | RVH | Ventricular Hypertrophy | right ventricular hypertrophy | 143 | | C71077 | |
| ANEUR | ST-T changes compatible with ventricular aneurysm | 1.0 | | | STTC | STTC | other ST-T descriptive statements | ST-T changes compatible with ventricular aneurysm | 227 | | | |
| RAO/RAE | right atrial overload/enlargement | 1.0 | | | HYP | RAO/RAE | Atrial statements | right atrial overload/enlargement | 141 | | | |
| EL | electrolytic disturbance or drug (former EDIS) | 1.0 | | | STTC | STTC | physiopathological nature of ST-T changes | compatible with electrolyte abnormalities | | | | |
| WPW | Wolf-Parkinson-White syndrome | 1.0 | | | CD | WPW | Intraventricular and intra-atrial Conduction disturbances | Wolff-Parkinson-White syndrome | | MDC_ECG_RHY_WPW_UNK | C35132 | |
| ILBBB | incomplete left bundle branch block | 1.0 | | | CD | ILBBB | Intraventricular and intra-atrial Conduction disturbances | incomplete left bundle branch block | | MDC_ECG_BEAT_LBB_BLK_INCOMP | C71047 | |
| IPLMI | inferoposterolateral myocardial infarction | 1.0 | | | MI | IMI | Myocardial Infarction | inferoposterolateral myocardial infarction | | | | |
| ISCAN | ischemic in anterior leads | 1.0 | | | STTC | ISCA | ischemic ST-T changes | in anterior leads | | | | |
| IPMI | inferoposterior myocardial infarction | 1.0 | | | MI | IMI | Myocardial Infarction | inferoposterior myocardial infarction | | | | |
| SEHYP | septal hypertrophy | 1.0 | | | HYP | SEHYP | Ventricular Hypertrophy | septal hypertrophy | | | | |
| INJIN | subendocardial injury in inferior leads | 1.0 | | | MI | IMI | ischemic ST-T changes compatible with subendocardial injury | in inferior leads | | | | |
| INJLA | subendocardial injury in lateral leads | 1.0 | | | MI | AMI | ischemic ST-T changes compatible with subendocardial injury | in lateral leads | | | | |
| PMI | posterior myocardial infarction | 1.0 | | | MI | PMI | Myocardial Infarction | posterior myocardial infarction | 162 | | | |
| 3AVB | third degree AV block | 1.0 | | | CD | _AVB | Sinus node dysfunction, atrial and AV-conduction defects | third degree AV block | 88 | MDC_ECG_RHY_AV_HEART_BLK_DEG_3 | C111091 | D3-32102 |
| INJIL | subendocardial injury in inferolateral leads | 1.0 | | | MI | IMI | ischemic ST-T changes compatible with subendocardial injury | in inferolateral leads | | | | |
| 2AVB | second degree AV block | 1.0 | | | CD | _AVB | Sinus node dysfunction, atrial and AV-conduction defects | second degree AV block | | MDC_ECG_RHY_AV_HEART_BLK_DEG_2 | C62016 | R-F81AE |
| ABQRS | abnormal QRS | | 1.0 | | | | Normal/abnormal | abnormal QRS | | | | |
| PVC | ventricular premature complex | | 1.0 | | | | Statements related to ectopic rhythm abnormalities | ventricular premature complex (beat) | 60 | MDC_ECG_BEAT_V_P_C | | |
| STD_ | non-specific ST depression | | 1.0 | | | | Basic roots for coding ST-T changes and abnormalities | non-specific ST depression | 502 | | | F-38278 |
| VCLVH | voltage criteria (QRS) for left ventricular hypertrophy | | 1.0 | | | | Ventricular Hypertrophy | voltage criteria (QRS) for left ventricular hypertrophy | | | | |
| QWAVE | Q waves present | | 1.0 | | | | Other QRS morphology descriptive statements | Q waves present | | | | |
| LOWT | low amplitude T-waves | | 1.0 | | | | other ST-T descriptive statements | low amplitude T-waves | 366 | | | |
| NT_ | non-specific T-wave changes | | 1.0 | | | | Basic roots for coding ST-T changes and abnormalities | non-specific T-wave changes | | | | |
| PAC | atrial premature complex | | 1.0 | | | | Statements related to ectopic rhythm abnormalities | atrial premature complex (beat) | 30 | MDC_ECG_BEAT_ATR_P_C | | |
| LPR | prolonged PR interval | | 1.0 | | | | Statements related to impulse formation (abnormalities) | Prolonged PR interval | 82 | | | |
| INVT | inverted T-waves | | 1.0 | | | | other ST-T descriptive statements | inverted T-waves | 367 | | | |
| LVOLT | low QRS voltages in the frontal and horizontal leads | | 1.0 | | | | Other QRS morphology descriptive statements | low QRS voltages in the frontal and horizontal leads | | | | |
| HVOLT | high QRS voltage | | 1.0 | | | | Other QRS morphology descriptive statements | high QRS voltage | | | | |
| TAB_ | T-wave abnormality | | 1.0 | | | | Basic roots for coding ST-T changes and abnormalities | T-wave abnormality | 147 | | | |
| STE_ | non-specific ST elevation | | 1.0 | | | | Basic roots for coding ST-T changes and abnormalities | non-specific ST elevation | 501 | MDC_ECG_RHY_STELVATION | | F-38277 |
| PRC(S) | premature complex(es) | | 1.0 | | | | Statements related to ectopic rhythm abnormalities | premature complex(es) | | | | |
| SR | sinus rhythm | | | 1.0 | | | Statements related to impulse formation (abnormalities) | sinus rhythm | 20 | MDC_ECG_RHY_SINUS_RHY | | |
| AFIB | atrial fibrillation | | | 1.0 | | | Statements related to impulse formation (abnormalities) | atrial fibrillation | 50 | MDC_ECG_RHY_ATR_FIB | | D3-31520 |
| STACH | sinus tachycardia | | | 1.0 | | | Statements related to impulse formation (abnormalities) | sinus tachycardia | 21 | MDC_ECG_RHY_SINUS_TACHY | | |
| SARRH | sinus arrhythmia | | | 1.0 | | | Statements related to impulse formation (abnormalities) | sinus arrhythmia | 23 | MDC_ECG_RHY_SINUS_ARRHY | | |
| SBRAD | sinus bradycardia | | | 1.0 | | | Statements related to impulse formation (abnormalities) | sinus bradycardia | 22 | MDC_ECG_RHY_SINUS_BRADY | | |
| PACE | normal functioning artificial pacemaker | | | 1.0 | | | Pacemaker types and pacemaker function | normal functioning artificial pacemaker | | | | |
| SVARR | supraventricular arrhythmia | | | 1.0 | | | Statements related to impulse formation (abnormalities) | supraventricular arrhythmia | | | | |
| BIGU | bigeminal pattern (unknown origin, SV or Ventricular) | | | 1.0 | | | Statements related to ectopic rhythm abnormalities | bigeminal pattern (unknown origin, SV or Ventricular) | | | | |
| AFLT | atrial flutter | | | 1.0 | | | Statements related to impulse formation (abnormalities) | atrial flutter | 51 | MDC_ECG_RHY_ATR_FLUT | | |
| SVTAC | supraventricular tachycardia | | | 1.0 | | | Statements related to impulse formation (abnormalities) | supraventricular tachycardia | 55 | MDC_ECG_RHY_SV_TACHY | | D3-31290 |
| PSVT | paroxysmal supraventricular tachycardia | | | 1.0 | | | Statements related to impulse formation (abnormalities) | paroxysmal supraventricular tachycardia | | MDC_ECG_RHY_SV_TACHY_PAROX | | |
| TRIGU | trigeminal pattern (unknown origin, SV or Ventricular) | | | 1.0 | | | Statements related to ectopic rhythm abnormalities | trigeminal pattern (unknown origin, SV or Ventricular) | | | | |