TABLE 4.

Post-Stent IVUS Findings of Successful Recanalized CTO Lesions

	Intraplaque Tracking (n = 98)	Subintimal Tracking (n = 84)	p Value
Total stent length, mm	47.2 (35.8–60.5)	69.9 (54.9–84.7)	<0.001
Subintimal stent length, mm	—	16.7 (7.3–32.2)	—
MSA in entire stent, mm2	5.4 (4.2–7.3)	4.8 (3.9–6.1)	0.25
MSA in CTO segment, mm2	6.1 (5.1–8.3)	6.2 (4.8–6.9)	0.55
Malapposition	16 (16.3)	12 (14.3)	0.70
Significant*	10 (10.2)	7 (8.3)	0.67
Tissue protrusion	5 (5.1)	17 (20.2)	0.002
Significant†	3 (3.1)	7 (8.3)	0.19
Stent edge dissection	10 (10.2)	13 (15.5)	0.29
Hematoma‡	4 (4.1)	1 (1.2)	0.38
Significant§	4 (4.1)	6 (7.1)	0.52

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

^*Malapposition area >10% lumen area.

^†protruded tissue area >10% stent area.

^‡including intramedial hematoma or perivascular hematoma.

^§dissection >3 mm in length and >60° in angle.

CSA = cross-sectional area; CTO = chronic total occlusion; EEM = external elastic membrane; MSA = minimum stent area.