Table 2.

Procedural characteristics of patients with angiographically confirmed stent thrombosis and matched controls

	Angiographically confirmed ST (n = 55)	Matched controls (n = 220)	p-value
Coronary anatomy
Left main artery	5 (9.1)	7 (3.2)	0.055
Left anterior descending artery	22 (40.0)	99 (45.0)	0.50
Circumflex artery	11 (20.0)	43 (19.5)	0.94
Right coronary artery	17 (30.9)	71 (32.3)	0.85
Lesion characteristics
AHA/ACC lesion complexity B2 or C	49 (89.1)	114 (51.8)	<0.001
Chronic total occlusion	3 (5.5)	13 (5.9)	0.90
Bifurcation lesion	26 (44.8)	80 (34.2)	0.13
Ostial lesion	13 (23.6)	26 (11.8)	0.025
Severe calcification	20 (36.4)	72 (32.7)	0.61
Severe tortuosity	4 (7.0)	13 (5.9)	0.76
Visible thrombus	17 (30.9)	71 (32.3)	0.85
Eccentric coronary vessel	4 (6.9)	11 (4.7)	0.49
Procedural characteristics
BMS implantation	26 (47.2)	88 (40.0)	0.29
DES implantation	29 (52.7)	132 (60.0)	0.25
First-generation DES	1 (1.8)	5 (2.3)	0.81
Second-generation DES	28 (48.3)	127 (56.2)	0.28
Mixed stents	2 (3.4)	5 (2.2)	0.58
No. of stents per patient	1.98 ± 0.82	1.56 ± 1.30	0.004
Stent length per patient, mm	38.2 ± 23.9	27.3 ± 16.0	<0.001
Stent diameter, mm	3.11 ± 10.4	2.96 ± 0.42	0.47
Pre-dilatation balloon pressure, atm	13.9 ± 4.3	11.8 ± 3.5	0.003
Stent implantation pressure, atm	14.5 ± 2.6	14.5 ± 3.3	0.98
Post-dilatation balloon pressure, atm	18.8 ± 3.6	18.4 ± 5.2	0.64
TIMI flow grade 3 before PCI	28 (50.9)	117(53.2)	0.77
TIMI flow grade 3 after PCI	51 (92.7)	218 (99.1)	0.004
Post procedural GpIIb/IIIa therapy	14 (25.5)	61 (27.7)	0.73

Values are mean ± SD or n (%)

AHA/ACC American Heart Association/American College of Cardiology, BMS bare-metal stent, DES drug-eluting stent, PCI percutaneous coronary intervention, ST stent thrombosis, TIMI thrombolysis in myocardial infarction