Coronary angiographic and collateral flow data
| Sufficient collaterals | Insufficient collaterals | p Value | |
| n | 17 | 37 | |
| Number of vessels diseased | 1.7 (0.7) | 1.7 (0.6) | NS |
| Diameter stenosis before PTCA | 85 (7)% | 79 (10)% | 0.04 |
| Coronary artery undergoing PTCA | |||
| LAD | 9 | 22 | NS |
| LCx | 3 | 4 | NS |
| RCA | 5 | 11 | NS |
| Site of PTCA | |||
| Proximal third | 5 | 18 | NS |
| Middle third (%) | 7 | 5 | NS |
| Distal third | 5 | 14 | NS |
| Angina pectoris during PTCA | 4 | 26 | 0.001 |
| Angiographic collateral score before PTCA | 1.0 (0.6) | 0.6 (0.6) | 0.03 |
| Angiographic collateral score during PTCA | 1.1 (1.2) (n=13) | 0.6 (0.7) (n=19) | 0.19 |
| Collateral flow index | 0.28 (0.09) | 0.12 (0.07) | < 0.0001 |
| Contrast washout time (heart beats) | 8.0 (2.9) | 17.5 (6.7) | < 0.0001 |
| Heart rate (beats/min) | 74 (12) | 70 (9.5) | NS |
| LV ejection fraction | 65 (14)% | 67 (10)% | NS |
| Ioversol as contrast medium | 10 | 27 | NS |
| Ioxaglate as contrast medium | 7 | 9 | NS |
Values are mean (SD) or n.
LAD, left anterior descending coronary artery; LCx, left circumflex coronary artery; LV, left ventricular; PTCA, percutaneus transluminal coronary angioplasty; RCA, right coronary artery; sufficient collaterals, no intracoronary or surface lead ECG ST segment shift (> 1 mm) during PTCA.