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Table 2 Lesion characteristics and procedural data

From: The outcomes of patients with very small coronary artery disease treated with thin strut cobalt chromium bare metal stents: an observational study

Variable All patients Vessel diameters ≤2.50 mm Vessel diameters >2.5 mm p value small versus large vessel diameters
Number of lesions 880 247 633
Target vessel     <0.001
LAD 290 (33.0 %) 98 (39.7 %) 192 (30.3 %)  
CX 233 (26.5 %) 92 (37.2 %) 141 (22.3 %)  
RCA 344 (39.1 %) 55 (22.3 %) 289 (45.7 %)  
graft 13 (1.5 %) 2 (0.8 %) 11 (1.7 %)  
Total occlusion 107 (12.2 %) 33 (13.4 %) 74 (11.7 %) 0.496
Chronic total occlusion 22 (2.5 %) 8 (3.2 %) 14 (2.2 %) 0.381
Thrombus burden 116 (13.2 %) 30 (12.1 %) 86 (13.6 %) 0.570
Diffuse vessel disease 442 (50.2 %) 140 (56.7 %) 302 (47.7 %) 0.017
Calcification 297 (33.8 %) 104 (42.1 %) 193 (30.5 %) 0.001
Ostial lesion 47 (5.3 %) 15 (6.1 %) 32 (5.1 %) 0.546
Bifurcation lesion 51 (5.8 %) 12 (4.9 %) 39 (6.2 %) 0.457
Severe tortuosity 104 (11.8 %) 36 (14.6 %) 68 (10.7 %) 0.114
AHA/ACC type B2/C lesion 353 (40.1 %) 104 (42.1 %) 249 (39.3 %) 0.451
Reference diameter (mm) 3.03 ± 0.53 2.05 ± 0.27 3.41 ± 0.55 <0.001
Lesion length 14.7 ± 7.8 14.7 ± 7.3 14.8 ± 8.0 0.950
Degree of stenosis (%) 86.3 ± 10.7 87.0 ± 9.7 86.0 ± 11.0 0.233
Pre-dilatation 396 (45.0 %) 129 (52.2 %) 267 (42.2 %) 0.007
BMSs used 1027 286 741
BMS diameter (mm) 3.02 ± 0.51 2.48 ± 0.25 3.23 ± 0.42 <0.001
BMS length (mm) 16.0 ± 5.9 15.7 ± 5.8 16.1 ± 5.9 0.399
BMS inflation pressure (atm) 15.0 ± 3.1 14.8 ± 3.1 15.1 ± 3.0 0.144
Additional DCB 17 (1.7 %) 3 (1.0 %) 14 (1.9 %) 0.344
Final result  % stenosis 1.7 ± 10.0 1.7 ± 11.0 1.7 ± 9.7 0.430
Overall technical success 1004 (97.8 %) 280 (97.9 %) 724 (97.7 %) 0.849