Procedural characteristics by annual hospital volume
| Lower volume: <200 procedures/year (n=2835) | Higher volume: ≥200 procedures/year (n=11 602) | |
| Diseased vessels | ||
| Three-vessel disease (%) | 688 (24.3%) | 2575 (22.2%) |
| Left main trunk lesion (%) | 105 (3.7%) | 532 (4.6%) |
| Location of target | ||
| Left main trunk | 64 (2.3%) | 421 (3.6%) |
| Left anterior descending | 1560 (45.0%) | 4960 (42.8%) |
| Right | 912 (32.2%) | 3556 (30.6%) |
| Highest-risk lesion | ||
| ACC/AHA type C lesion (%) | 629 (22.2%) | 3755 (32.4%) |
| Bifurcation lesion (%) | 792 (27.9%) | 3273 (28.2%) |
| CTO (%) | 139 (4.9%) | 832 (7.2%) |
| Type of stent | ||
| DES (%) | 1685 (59.4%) | 8293 (71.5%) |
| Access site | ||
| TRI (%) | 550 (19.4%) | 5212 (44.9%) |
| Device | ||
| IABP (%) | 91 (3.2%) | 611 (5.3%) |
| IVUS (%) | 2379 (83.9%) | 10 158 (87.6%) |
| Amount of contrast medium (mL) | 206.0±96.1 | 162.5±71.2 |
Values are presented as n (%) or mean±SD, as indicated.
ACC, American College of Cardiology; AHA, American Heart Association; CTO, chronic total occlusion; DES, drug-eluting stent; IABP, intra-aortic balloon pump; IVUS, intravascular ultrasound; TRI, trans-radial intervention.