Variables that determine appropriateness
| Variable | Description |
|---|---|
| Severity of angina | Asymptomatic, CCS class I, II, III or IV |
| Extent of medical therapy | Maximum antianginal Rx: use of at least two classes of drugs to reduce angina symptoms |
| Extent of ischaemia | Based on non-invasive stress testing and assessment of ischaemic risk (low, intermediate, high) |
| Extent of anatomic disease | One-vessel, two-vessel, three-vessel disease, with or without proximal LAD or left main coronary artery |
CCS, Canadian Cardiovascular Society; proximal LAD, proximal left anterior descending coronary artery.