Table 2.
Overlap in Features Between Data‐Driven and Human‐Expert Techniques
| 12‐Lead ECG Component | Number of Features Selected | Comparison Between Techniques | ||
|---|---|---|---|---|
| Human Expert | Data‐Driven | Overlap in Features | Features Overlooked by Clinicians | |
| ECG normalization (k=2) | 2 | 2 | Age and sex | … |
| P duration, amplitude, or area (k=72) | 0 | 25 | … | Lead‐specific P duration and amplitude |
| PR interval metrics (k=26) | 1 | 11 | Global PR interval | Lead‐specific PR interval |
| Q duration or amplitude (k=24) | 0 | 10 | … | Lead‐specific Q wave presence |
| R duration or amplitude (k=48) | 0 | 23 | … | Lead‐specific R amplitude |
| S duration or amplitude (k=48) | 0 | 16 | … | S amplitude in precordial leads |
| Other QRS complex metrics (k=74) | 1 | 31 | Global QRS duration | QRS notch; ventricular activation time; lead‐specific QRS duration or area |
| Selvester Score (k=19) | 1 | 0 | Total scar size | … |
| ST amplitude, duration, or slope (k=72) | 12 | 31 | Lead‐specific ST amplitude | Lead‐specific ST duration and slope |
| ST deviation morphology (k=14) | 0 | 7 | … | Presence of concaved ST deviation |
| T duration, amplitude, or area (k=76) | 14 | 33 | Lead‐specific T amplitude, T‐to‐R relative amplitude | Lead‐specific T duration or area; presence of notched T wave |
| QT interval and subintervals (k=23) | 4 | 12 | Global QTc, Tpeak−Tend | Lead‐specific QT interval |
| QRS axis (k=12) | 1 | 7 | Frontal plane QRS axis | Horizontal and spatial QRS axis |
| T axis (k=11) | 4 | 6 | T axis in frontal, horizontal, and spatial planes | … |
| QRS and T vector angles (k=5) | 2 | 3 | QRS‐T angle and TCRT | … |
| T loop morphology (k=6) | 4 | 4 | T asymmetry and dispersion | … |
| Principal components analysis (k=16) | 16 | 6 | Principal component analysis ratio of J, T, and ST‐T | … |
| Noise signal (k=8) | 3 | 2 | Noise and baseline wander | … |