Table 1

OFDI Results After PCI

OFDI-Guided (n = 54)IVUS-Guided (n = 49)p Value
In-stent segment
 3D analysis
  Stent volume, mm3139.9 (111.7–184.3)158.1 (123.1–220.8)0.33
  Lumen volume, mm3142.7 (113.4–188.9)164.1 (126.4–232.9)0.27
 2D analysis
  Length, mm23.1 (18.0–26.0)19.0 (15.9–27.5)0.47
  Mean stent area, mm26.36 (4.95–7.68)6.68 (5.91–8.79)0.054
  Minimum stent area, mm25.17 (4.06–6.29)5.63 (4.76–7.52)0.088
  Mean lumen area, mm26.45 (5.22–7.82)7.07 (6.14–9.14)0.037
  Minimum lumen area, mm25.28 (4.05–6.25)5.62 (4.69–7.69)0.099
  Stent expansion index0.82 (0.71–0.94)0.89 (0.81–0.99)0.17
  Cases with stent expansion index of >0.826 (61.9)28 (77.8)0.15
 Stent malapposition
  Stent with malapposition38 (73.1)38 (84.4)0.22
  Location of malapposition
   Proximal edge17 (32.7)15 (33.0)1.00
   Distal edge6 (11.5)7 (15.6)0.77
   Stent body29 (55.8)29 (64.4)0.41
  Mean number of malapposed struts7.0 (0.0–18.5)7.0 (1.0–20.0)0.45
  Malapposed strut, %3.02 (0.00–7.15)2.22 (0.75–8.57)0.48
  Stent malapposition volume, mm31.09 (0.15–4.38)1.11 (0.37–4.78)0.46
  Mean stent malapposition area, mm20.05 (0.01–0.14)0.04 (0.02–0.15)0.41
 Tissue protrusion
  Stent with tissue protrusion44 (84.6)41 (91.1)0.37
  Mean number of tissue protrusions5.00 (2.00–6.00)4.00 (2.00–7.00)0.87
  Length of tissue protrusion, mm1.12 (0.84–1.39)1.01 (0.79–1.27)0.43
  Tissue protrusion volume, mm32.28 (1.38–3.77)2.34 (1.28–3.96)0.83
  Mean tissue protrusion area, mm20.10 (0.06–0.15)0.09 (0.07–0.16)0.99
  Maximum tissue protrusion area, mm20.14 (0.09–0.18)0.16 (0.11–0.20)0.25
  Maximum tissue protrusion thickness, mm0.22 (0.18–0.25)0.24 (0.19–0.28)0.13
 Classification of tissue protrusion
  Smooth protrusion39 (75)29 (64)0.275
  Disrupted fibrous tissue protrusion35 (67)28 (62)0.672
  Irregular protrusion25 (48)33 (73)0.014
 Irregular protrusion
  Mean number of irregular protrusions0.00 (0.00–2.00)2.00 (0.00–2.00)0.025
  Maximum irregular protrusion length, mm0.00 (0.00–0.32)0.23 (0.00–0.36)0.087
  Maximum irregular protrusion area, mm20.00 (0.00–0.26)0.16 (0.00–0.27)0.098
  Maximum irregular protrusion thickness, mm0.00 (0.00–1.46)1.14 (0.00–1.52)0.087
 Thrombus
  Stents with thrombus24 (46.2)27 (60.0)0.22
  Mean number of thrombi0.00 (0.00–1.00)1.00 (0.00–1.00)0.29
  Length of thrombus, mm0.00 (0.00–1.25)0.89 (0.00–1.39)0.16
  Maximum thrombus area, mm20.00 (0.00–0.23)0.17 (0.00–0.27)0.16
  Maximum thrombus thickness, mm0.00 (0.00–0.40)0.30 (0.00–0.43)0.34
 In-stent dissection
  Stent with in-stent dissection39 (75.0)37 (82.2)0.46
  Mean number of dissections2.00 (0.50–4.00)2.00 (1.00–5.00)0.15
  Length of dissection, mm0.55 (0.13–0.94)0.73 (0.44–1.01)0.22
  Maximum dissection length, mm0.37 (0.09–0.58)0.41 (0.24–0.63)0.44
Proximal reference segment
 Length, mm5.06 (5.06–5.06)5.06 (4.94–5.06)0.14
 Lumen volume, mm334.4 (26.5–40.8)35.5 (28.6–43.6)0.39
 Mean lumen area, mm26.61 (5.10–8.38)8.01 (5.57–9.41)0.25
 Minimum lumen area, mm26.01 (4.16–7.62)6.61 (4.54–7.94)0.25
 Minimum thickness of intima media complex, μm282.0 (225.0–396.0)244.0 (206.0–310.0)0.07
 Arc of disease-free segment, °60.8 (0.0–103.7)98.4 (0.0–135.0)0.04
 Thin-cap fibroatheroma2 (4.3)1 (2.6)1.00
 Calcification22 (46.8)18 (46.2)1.00
 Thrombus6 (12.8)6 (15.4)0.76
 Dissection11 (23.4)10 (25.6)1.00
 Length of dissection, mm0.00 (0.00–0.00)0.00 (0.00–0.38)0.72
 Dissection with hematoma0 (0.0)4 (10.3)0.04
Distal reference segment
 Length, mm5.06 (5.06–5.06)5.06 (5.06–5.06)0.42
 Lumen volume, mm324.1 (18.9–31.2)24.0 (20.1–33.8)0.52
 Mean lumen area, mm24.71 (3.64–6.02)4.70 (3.73–6.77)0.62
 Minimum lumen area, mm24.15 (2.76–5.55)3.97 (3.06–5.62)0.95
 Minimum thickness of intima media complex, μm265.0 (234.0–356.0)237.5 (218.0–286.0)0.02
 Arc of disease-free segment, °75.7 (0.0–97.2)103.2 (62.4–129.5)<0.01
 Thin-cap fibroatheroma1 (2.1)0 (0.0)1.00
 Calcification12 (25.5)9 (21.4)0.80
 Thrombus2 (4.3)1 (2.4)1.00
 Dissection4 (8.5)5 (11.9)0.73
 Length of dissection, mm0.00 (0.00–0.00)0.00 (0.00–0.00)0.60
 Dissection with hematoma0 (0.0)1 (2.4)0.47

Values are median (interquartile range) or n (%).

OFDI = optical frequency domain imaging; IVUS = intravascular ultrasound; PCI = percutaneous coronary intervention; 3D = 3-dimensional; 2D = 2-dimensional.