The Risk of Paradoxical Embolism score (maximum of 10 points)
| Characteristics | Points |
| Vascular risk factors | |
| No hypertension | 1 |
| No diabetes mellitus | 1 |
| No prior stroke or transient ischaemic attack | 1 |
| Non-smoker | 1 |
| Age (years) | |
| 18–29 | 5 |
| 30–39 | 4 |
| 40–49 | 3 |
| 50–59 | 2 |
| 60–69 | 1 |
| ≥70 | 0 |
| Stroke features | |
| Cortical infarction | 1 |