Waiting time, priority points, clinical variables, and cardiac events while waiting for bypass surgery (as at 31 December 1996, median follow up 22 months)
| All patients | Acute cases | All elective cases | Elective cases | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cardiac events while waiting | No cardiac events while waiting | ||||||||
| n | 324 | 67 | 257 | 107 | 150 | ||||
| Median waiting time, days (IQ range) | 106 (22–383) | 9 (6–15) | 212 (69–431) | 137 (42–381) | 251 (92–461) | ||||
| New Zealand score | 46 (36–66) | 78 (71–83) | 41 (33–52) | 43 (34–55) | 41 (32–49) | ||||
| Ontario score | 5.25 (4–6) | 2.55 (2.35–3.4) | 5.6 (4.85–6.05) | 5.6 (4.85–6.00) | 5.8 (4.9–6.2) | ||||
| Angina | |||||||||
| Class I–III | 61% | 4% | 76% | 72% | 80% | ||||
| Class IV | 39% | 96% | 24% | 28% | 20% | ||||
| LVEF | |||||||||
| ⩽ 50% | 23% | 28% | 24% | 21% | 26% | ||||
| > 50% | 77% | 72% | 76% | 79% | 74% | ||||
| Left main disease | 24% | 34% | 21% | 17% | 23% | ||||
| 3 vessel disease including PLAD | 48% | 45% | 49% | 56% | 44% | ||||
LVEF, left ventricular ejection fraction; PLAD, proximal left anterior descending coronary artery.