Research Article

Effect of Crack Patterns in Calcified Plaque on Lumen Area after Stenting for a Severe Calcified Coronary Artery (from the Optical Frequency Domain Imaging-Guided Percutaneous Coronary Artery Intervention for Calcified Lesion Registry)

Table 3

OFDI analysis.

VariableType 0 (n = 58)Type 1 (n = 72)Type 2 (n = 112) value

Estimated vessel diameter (mm)4.05 ± 0.494.09 ± 0.513.89 ± 0.460.01
Estimated vessel area (mm2)13.04 ± 3.2613.27 ± 3.1712.03 ± 2.740.01
Major axis diameter before using CB (mm)2.36 ± 0.372.29 ± 0.372.11 ± 0.460.0004
Minor axis diameter before using CB (mm)1.79 ± 0.311.72 ± 0.311.57 ± 0.310.0001
Lumen area before using CB (mm2)3.37 ± 1.023.10 ± 0.912.73 ± 1.010.0003
Calcium arc (°)251 ± 56294 ± 62277 ± 530.0001
Calcium arc 315–360°8 (14%)32 (44%)28 (25%)0.0009
Calcium arc 270–314°16 (28%)18 (25%)40 (36%)0.25
Calcium arc 225–269°10 (17%)12 (17%)24 (21%)0.67
Calcium arc 180–224°24 (41%)10 (15%)20 (18%)0.0005
Major axis diameter after using CB (mm)2.56 ± 0.322.63 ± 0.422.67 ± 0.410.22
Minor axis diameter after using CB (mm)1.99 ± 0.281.99 ± 0.281.95 ± 0.290.52
Lumen area after using CB (mm2)4.08 ± 0.874.21 ± 1.084.17 ± 1.150.80
Cracked calcium thickness (µm)N/A465 ± 162 (n = 42)387 ± 312 (n = 26)0.08
Final lumen area (mm2)6.43 ± 1.316.38 ± 1.366.66 ± 1.510.38
Symmetry index0.86 ± 0.090.84 ± 0.080.86 ± 0.080.45
Final lumen area/estimated vessel area (%)51.2 ± 12.450.0 ± 12.256.9 ± 13.00.0005

Data are presented as number (%) or mean ± standard deviation, unless otherwise noted. CB, cutting balloon; OFDI, optical frequency domain imaging.