Intraoperative and perioperative period (N=30) | Value |
Balloon/artery ratio (pre-dilatation), mean±SD | 66.7±7.6 |
Balloon/artery ratio (post-dilatation), mean±SD | 86.5±9.0 |
Plaque protrusion detected by IVUS, n (%) | 9 (30.0) |
Plaque protrusion detected by angiography, n (%) | 2 (6.7) |
Maximum residual stenosis diameter (mm), mean±SD | 3.7±0.5 |
Residual stenosis ratio (%), mean±SD | 31.9±9.1 |
Portion with ISA on IVUS, n (%) | |
Distal portion of the dual-layer part, n (%) | 8 (26.7) |
Middle portion of the dual-layer part, n (%) | 0 (0) |
Proximal portion of the dual-layer part, n (%) | 0 (0) |
Bradycardia and hypotension, n (%) | 14 (46.6) |
Asymptomatic hyperintensity detected by DWI, n (%) | 10 (33.3) |
Cerebrovascular event, n (%) | 1 (3.3) |
Follow-up after 6 months (N=25) | |
Restenosis ≧50% on angiography, n (%) | 8 (26.7) |
Portion with MIT on IVUS | |
Distal portion of the dual-layer part, n (%) | 0 (0) |
Middle portion of the dual-layer part, n (%) | 19 (76.0) |
Proximal portion of the dual-layer part, n (%) | 6 (24.0) |
Dissociation between the dual layers on IVUS | 12 (40.0) |
Cerebrovascular event, n (%) | 1 (3.3) |
Retreatment, n (%) | 3 (10.0) |
DWI, diffusion-weighted imaging; ISA, incomplete stent apposition; IVUS, intravascular ultrasound; MIT, maximum intimal thickness; SD, standard deviation.