Rating scale accepted by the Ontario panel
| Level | Timing |
|---|---|
| 1. Emergency | Immediate revascularisation |
| 2. Extremely urgent | Within 24 hours |
| 3. Urgent | 24 to 72 hours |
| 4. Semi-urgent | 72 hours to 14 days (same admission) |
| 5. Short list | 2 to 6 weeks |
| 6. Delayed | 6 weeks to 3 months |
| 7. Marked delay | 3 to 6 months |
Adapted with permission from: Naylor CD, Baigrie RS, Goldman BS, et al. Assessment of priority for coronary revascularisation procedures.Lancet1990;335:1070–3. (Copyright by The Lancet Limited, 1990.)