Table 2.
Overview of primary statements and modifiers in the dataset.
| Category | Code | Primary Statement (+ Modifier) | Count |
|---|---|---|---|
| A | 1 | Normal ECG | 13905 |
| C | 21 | Sinus tachycardia | 725 |
| C | 22 | Sinus bradycardia | 2711 |
| C | 23 | Sinus arrhythmia | 1553 |
| D | 30 | Atrial premature complex(es) | 539 |
| 308 | + Occasional | 153 | |
| 310 | + Frequent | 125 | |
| 340 | + Couplets | 11 | |
| 341 | + In a bigeminal pattern | 31 | |
| 349 | + With aberrancy | 16 | |
| D | 31 | Atrial premature complexes, nonconducted | 4 |
| D | 36 | Junctional premature complex(es) | 64 |
| D | 37 | Junctional escape complex(es) | 20 |
| E | 50 | Atrial fibrillation | 675 |
| 346 | + With a rapid ventricular response | 210 | |
| 347 | + With a slow ventricular response | 6 | |
| E | 51 | Atrial flutter | 99 |
| E | 54 | Junctional tachycardia | 13 |
| F | 60 | Ventricular premature complex(es) | 1067 |
| 308 | + Occasional | 271 | |
| 310 | + Frequent | 277 | |
| 340 | + Couplets | 3 | |
| 341 | + In a bigeminal pattern | 70 | |
| 342 | + In a bigeminal pattern | 38 | |
| 350 | + Polymorphic | 3 | |
| H | 80 | Short PR interval | 11 |
| H | 81 | AV conduction ratio N:D | 3 |
| H | 82 | Prolonged PR interval | 238 |
| H | 83 | Second-degree AV block, Mobitz type I (Wenckebach) | 9 |
| H | 84 | Second-degree AV block, Mobitz type II | 3 |
| H | 85 | 2:1 AV block | 35 |
| H | 86 | AV block, varying conduction | 47 |
| H | 87 | AV block, advanced (high-grade) | 3 |
| H | 88 | AV block, complete (third-degree) | 22 |
| I | 101 | Left anterior fascicular block | 154 |
| I | 102 | Left posterior fascicular block | 6 |
| I | 104 | Left bundle-branch block | 84 |
| I | 105 | Incomplete right bundle-branch block | 1259 |
| I | 106 | Right bundle-branch block | 710 |
| I | 108 | Ventricular preexcitation | 27 |
| J | 120 | Right-axis deviation | 161 |
| J | 121 | Left-axis deviation | 138 |
| J | 125 | Low voltage | 322 |
| K | 140 | Left atrial enlargement | 19 |
| K | 142 | Left ventricular hypertrophy | 209 |
| K | 143 | Right ventricular hypertrophy | 6 |
| L | 145 | ST deviation | 1829 |
| 362 | + Depression | 1024 | |
| 363 | + Elevation | 37 | |
| L | 146 | ST deviation with T-wave change | 1063 |
| L | 147 | T-wave abnormality | 2218 |
| 367 | + Inversion | 176 | |
| L | 148 | Prolonged QT interval | 24 |
| L | 152 | TU fusion | 9 |
| L | 153 | ST-T change due to ventricular hypertrophy | 88 |
| L | 155 | Early repolarization | 32 |
| M | 160 | Anterior MI | 52 |
| 330 | + Acute | 1 | |
| 332 | + Old | 47 | |
| M | 161 | Inferior MI | 120 |
| 330 | + Acute | 2 | |
| 331 | + Recent | 3 | |
| 332 | + Old | 114 | |
| M | 165 | Anteroseptal MI | 91 |
| 330 | + Acute | 4 | |
| 331 | + Recent | 9 | |
| 332 | + Old | 75 | |
| M | 166 | Extensive anterior MI | 7 |
| 332 | + Old | 7 |