Table 2.

Lesion Characteristics

n=65
CTO vessel, n (%)
 LMT1 (1.5)
 RCA26 (40.0)
 LAD30 (46.2)
 LCx8 (12.3)
CTO location, n (%)
 Proximal29 (44.6)
 Middle31 (47.7)
 Distal5 (7.7)
CTO lesion characteristics, n (%)
 Blunt-type entry point26 (40.1)
 Calcification21 (32.3)
 Tortuosity6 (9.2)
 Bent13 (20.0)
 Bifurcation23 (35.4)
 Bridge collateral32 (49.2)
J-CTO score ≥2, n (%)42 (64.6)
Vessel diameter by visual estimation, mm2.97±0.36
CTO length by visual estimation, mm20.15±2.97
Collaterals Rentrop grade >2, n (%)53 (81.5)
In-stent CTO, n (%)2 (3.1)
No. of diseased vessels, n (%)
 Single-vessel disease31 (47.7)
 2 vessel disease22 (33.8)
 3 vessel disease12 (18.5)
  • Values are n (%) or mean±SD. CTO indicates chronic total occlusion; J-CTO, Multicenter CTO Registry of Japan; LAD, left anterior descending artery; LCx, left circumflex artery; LMT, left main trunk; and RCA, right coronary artery.