Table 2: Angiographic and procedural findings.

ELCA groupNon-ELCA groupp value
(n = 18)(n = 24)

Number of treated segments, n2024
Target vessel
 LMCA, %0 (0)0 (0)NS
 LAD, %10 (50.0)17 (70.8)0.16
 LCX, %2 (10.0)3 (12.5)0.79
 RCA, %8 (40.0)4 (16.7)0.08
 Bypass graft, %0 (0)0 (0)NS
Previous stent type0.09
 BMS, %9 (45.0)5 (20.8)
 DES, %11 (55.0)19 (79.2)
Restenosis morphology
 Focal margin, %1 (5.0)6 (25.0)0.06
 Focal body, %4 (20.0)9 (37.5)0.20
 Multifocal, %3 (15.0)4 (16.7)0.88
 Diffuse, %11 (55.0)3 (12.5)<0.01
 Proliferative, %0 (0)0 (0)NS
 Occlusive, %1 (5.0)4 (16.7)0.21
Scoring balloon
 Balloon diameter, mm3.36 ± 0.352.92 ± 0.32<0.01
 Inflation pressure, atm11.0 ± 2.512.7 ± 4.00.11
 Balloon-to-artery ratio1.36 ± 0.251.23 ± 0.330.14
DCB
 Mean diameter, mm3.22 ± 0.382.87 ± 0.29<0.01
 Total length, mm23.7 ± 5.128.0 ± 14.40.20
 Inflation pressure, atm9.2 ± 3.08.6 ± 2.60.50
 Inflation time, sec49.8 ± 7.754.2 ± 10.00.11
 Balloon-to-artery ratio1.26 ± 0.291.22 ± 0.350.66
QCA analysis
 Preprocedure
  Minimal luminal diameter, mm0.61 ± 0.240.44 ± 0.320.06
  Diameter stenosis, %68.4 ± 25.182.2 ± 12.60.02
  Reference vessel diameter, mm2.54 ± 0.572.45 ± 0.480.58
  Lesion length, mm17.4 ± 11.123.0 ± 10.70.11
 Postprocedure
  Minimal luminal diameter, mm2.08 ± 0.422.16 ± 0.420.58
  Diameter stenosis, %24.2 ± 10.416.6 ± 10.00.02
  Acute gain, mm1.50 ± 0.481.71 ± 0.490.16
 Follow-up
  Minimal luminal diameter, mm1.77 ± 0.681.89 ± 0.580.53
  Diameter stenosis, %34.5 ± 21.526.4 ± 19.60.21
  Late lumen loss, mm0.34 ± 0.770.26 ± 0.650.74
  Late lumen enlargement, %6 (31.6)9 (37.5)0.69
  Binary restenosis, %3 (15.8)1 (4.2)0.19

Continuous variables expressed as mean ± standard deviation; categorical variables, as number (percentage). Balloon-to-artery ratio was calculated as the ratio of the maximum balloon diameter by reference vessel diameter.
ELCA, excimer laser coronary atherectomy; LMCA, left main coronary artery; LAD, left anterior descending artery; LCX, left circumflex artery; RCA, right coronary artery; BMS, bare-metal stent; DES, drug-eluting stent; DCB, drug-coated balloon; QCA, quantitative coronary angiography.