Table 3.

IVUS Findings in Successfully Recanalized CTO Lesions

	Intraplaque Tracking (n = 73)	Subintimal Tracking (n = 84)	p Value
Total Stent Length, mm	46.1 [31.9, 58.7]	74.1 [55.7, 86.8]	<0.0001
Subintimal Length, mm	—	17.4 [8.2, 34.6]	—
>10 mm	—	39 (46.4)	—
MSA in entire stent length, mm2	5.5 [4.1, 7.3]	4.8 [3.8, 6.01]	0.03
MSA < 5 mm2 entire stent length	31/70 (44.3)	33/62 (53.2)	0.30
MSA in CTO segment, mm2	6.1 [4.9–8.3]	6.2 [5.1–6.9]	0.31
MSA <5 mm2 in CTO segment	22 (30.1)	37 (44.1)	0.07
IVUS-VI *	35 (48.9)	77 (91.7)	<0.0001
Intramural Hematoma	13 (17.8)	48 (57.1)	<0.0001
Perivascular Hematoma	5 (6.9)	30 (35.7)	<0.0001
Total Length Of Hematoma	9.0 [5.2,12.3]	14.0 [6.8, 22.3]	0.07
Perivascular Blood Speckle	29 (39.7)	66 (78.7)	<0.0001
Malapposition	12 (17.1)	10 (16.1)	0.88
Significant†	8 (11.4)	4 (6.5)	0.38
Tissue Protrusion	5 (7.1)	10 (16.1)	0.17
Significant‡	3 (4.3)	5 (8.1)	0.47
Stent Edge Dissection	6 (8.2)	11 (13.1)	0.33
Significant§	3 (4.3)	5 (8.1)	0.47

Continuous values are reported as mean ± (standard deviation) or median [interquartile range]

^*IVUS-VI includes any of the following: intramedial hematoma, perivascular hematoma, perivascular blood speckle.

^†Malapposition area >10% lumen area.

^‡Protruded tissue area >10% stent area.

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

MSA - minimum stent area, CTO- chronic total occlusion, IVUS-VI – intravascular ultrasound vascular injury