Impact of Lesion Preparation Technique on Side Branch Compromise in Calcified Coronary Bifurcations: A Subgroup Analysis of the PREPARE-CALC Trial
Table 2
Angiographic and procedural characteristics (n = 115 lesions).
SCB (n = 47)
RA (n = 68)
value
Angiographic characteristics
Location
0.84
Left main
12 (25.5%)
15 (22.1%)
Left anterior descending
28 (59.6%)
43 (63.2%)
Left circumflex
5 (10.6%)
8 (11.8%)
Right coronary artery
2 (4.3%)
2 (2.9%)
Reference vessel diameter (mm)
3.27 ± 0.46
3.26 ± 0.45
0.87
Lesion length (mm)
26.06 ± 13.84
27.34 ± 14.83
0.64
Diameter stenosis (%)
83.57 ± 8.99
85.94 ± 9.63
0.19
Ostial location
15 (31.9%)
31 (45.6%)
0.14
Angle > 70% between MB and SB
18 (38.3%)
23 (33.8%)
0.62
SB > 2 mm
41 (87.2%)
54 (79.4%)
0.28
True bifurcation lesions
23 (49%)
29 (43%)
0.50
Medina classification
1.1.0
19 (40.4%)
30 (44.1%)
1.1.1
18 (38.3)
26 (38.2%)
1.0.1
2 (4.2%)
1 (1.5%)
1.0.0
0
1 (1.5%)
0.1.1
2 (4.2%)
1 (1.5%)
0.1.0
5 (10.6%)
8 (11.7%)
0.0.1
1 (2.1%)
1 (1.5%)
Procedural characteristics
SCB or RA in SB
3 (6.3%)
2 (2.9%)
0.38
Wire in SB
28 (59.7%)
36 (52.9%)
0.48
SB kissing or balloon dilation after stenting
17 (36.2%)
26 (38.2%)
0.82
Stenting technique
0.75
One-stent technique
36 (76.6%)
51 (75%)
Two-stent technique
10 (21.3%)
17 (25%)
Culotte
6 (12.8%)
6 (8.8%)
T-stenting
1 (2.1%)
2 (2.9%)
DK-crush
0
1 (1.5%)
Minicrush
1 (2.1%)
1 (1.5%)
TAP stenting
2 (4.2%)
7 (10.3%)
No stent
1 (2.1%)
0
Stenting of the SB
10 (21.3%)
17 (25%)
0.85
Elective
7 (14.9%)
11 (16.2%)
Bailout
3 (6.4%)
6 (8.8%)
POT
28 (59.6%)
42 (61.8%)
0.81
LMT involvement during the PCI
21 (44.7%)
28 (41.2%)
0.71
Cutting/scoring balloon diameter (mm)
3.04 ± 0.32
—
—
Cutting/scoring balloon pressure (atm)
15.30 ± 2.3
—
—
Starting burr size (mm)
—
1.51 ± 0.17
—
Max. burr size (mm)
—
1.53 ± 0.17
—
Use of >1 burr
—
6 (8.8%)
-—
Rotational speed (RPM)
—
164,895 ± 22,038
—
Number of predilatation balloons
1.74 ± 0.85
1.75 ± 0.98
0.95
Max. predilatation balloon diameter (mm)
2.78 ± 0.47
2.90 ± 0.38
0.16
Max. predilatation balloon pressure (atm)
18.22 ± 3.43
19.50 ± 5.08
0.20
No. of stents/lesions
1.85 ± 0.92
1.50 ± 0.68
0.02
Total stent length/lesion (mm)
37.09 ± 17.63
33.88 ± 15.71
0.31
Min. stent diameter (mm)
3.14 ± 0.41
3.08 ± 0.47
0.50
Max. stent diameter (mm)
3.43 ± 0.41
3.30 ± 0.40
0.09
Max. stent implantation pressure (atm)
16.61 ± 2.83
16.92 ± 3.32
0.57
Balloon postdilatation
41 (87.2%)
62 (91.1%)
0.50
Max. postdilatation balloon diameter (mm)
3.56 ± 0.56
3.65 ± 0.53
0.06
Max. postdilatation balloon pressure (atm)
20.54 ± 3.23
21.13 ± 4.10
0.44
Procedural result on SB
Compromised at any time during the procedure
25 (53.2%)
28 (41.2%)
0.20
Compromised at the end of the procedure
15 (31.9%)
5 (7.4%)
0.001
Mechanism of SB compromise
Significant stenosis
13 (27.7%)
4 (5.9%)
Dissection
2 (4.3%)
1 (1.5%)
TIMI flow <3 in SB
4 (8.5%)
2 (3%)
Values are n (%) or mean ± SD; DK-crush = double kissing crush; MB = main branch; LMT = left main trunk; POT = proximal optimization technique; RPM = rotations per minute; RA = rotational atherectomy; SB = side branch; SCB = scoring/cutting balloon; TAP = T-and-protrusion technique. True bifurcation lesions: Medina 1.1.1, 1.0.1, and 0.1.1.
