Table 2

Coronary Angiographic and Optical Coherence Tomographic Findings

Total (n = 76)9 Months2 Yearsp Value
Quantitative coronary angiography
 Target vessel
  Left anterior descending artery34 (44.7)
  Left circumflex artery17 (22.4)
  Right coronary artery25 (32.9)
 Type B2 or C lesion55 (72.4)
 Stent diameter, mm3.0 ± 0.3
 Stent length, mm26.5 ± 6.5
 Maximal inflation pressure, atm16.0 ± 2.2
 Pre-intervention
  Reference vessel diameter, mm2.7 ± 0.4
  Minimal lumen diameter, mm0.7 ± 0.5
 Post-intervention
  Reference vessel diameter, mm2.8 ± 0.4
  Minimal lumen diameter, mm2.7 ± 0.3
 Follow-up
  Reference vessel diameter, mm2.7 ± 0.42.8 ± 0.30.23
  Minimal lumen diameter, mm2.3 ± 0.42.0 ± 0.4<0.001
  Late loss, mm0.39 ± 0.380.66 ± 0.43<0.001
OCT
 Time interval to OCT, days276 ± 56735 ± 79
 Quantitative analysis
  Cross-sectional level analysis
   Mean stent CSA, mm27.0 ± 1.67.0 ± 1.60.92
   Mean lumen CSA, mm25.7 ± 1.45.4 ± 1.60.01
   Mean NIH area, mm21.3 ± 0.91.7 ± 1.10.001
   Percent NIH CSA, %18.7 ± 11.323.4 ± 14.5<0.001
   Cross sections with any uncovered strut, %21.2 ± 22.112.2 ± 16.9<0.001
   Cross sections with uncovered strut ratio >0.3, %7.7 ± 14.54.3 ± 11.9<0.001
   Cross sections with any malapposed strut, %2.4 ± 5.73.1 ± 9.00.36
  Strut level analysis
   Mean NIH thickness, μm164 ± 95214 ± 132<0.001
   Percentage of uncovered struts, %4.4 ± 6.12.3 ± 4.0<0.001
   Percentage of malapposed strut, %0.6 ± 1.90.9 ± 3.50.24
   Percentage of uncovered and malapposed struts, %0.3 ± 1.30.3 ± 1.90.89
  Qualitative analysis
  Intracoronary thrombus8 (10.5)7 (9.2)>0.99
  Lipid-laden neointima11 (14.5)21 (27.6)0.009
  Thin-cap neoatheroma3 (3.9)10 (13.2)0.07
  Heterogeneous pattern49 (64.5)47 (61.8)>0.99
  Neovascularization34 (44.7)56 (73.7)<0.001
  Extrastent lumen15 (19.7)21 (27.6)0.04

Values are n (%) or mean ± SD.

CSA = cross-sectional area; NIH = neointimal hyperplasia; OCT = optical coherence tomography.