Table 2.

Lesion, Procedural, and Angiographic Characteristics

Variables	All lesions (n=125)	PMI (n=50)	Non‐PMI (n=75)	P value
Lesion characteristics
Target vessel: LAD/LCX/RCA, %	53.6/16.0/30.4	56.0/20.0/24.0	52.0/13.3/34.7	0.39
Lesion location: proximal/mid/distal, %	36.8/56.8/6.4	30.0/66.0/4.0	41.3/50.7/8.0	0.24
Multivessel disease	73 (58.4%)	30 (60%)	43 (57.3%)	0.77
Procedural characteristics
No. of stents	1.21±0.43	1.28±0.45	1.16±0.40	0.12
Stent diameter, mm	3.10±0.43	3.03±0.35	3.15±0.48	0.14
Stent length, mm	30.0±14.5	34.2±14.9	27.1±13.5	0.007
Distal protection device, n (%)	13 (10.4%)	7 (14.0%)	6 (8.0%)	0.29
Angiographic analysis
Pre‐PCI
Reference vessel diameter, mm	2.68±0.49	2.58±0.44	2.75±0.51	0.17
Minimum lumen diameter, mm	1.08±0.40	0.98±0.31	1.04±0.25	0.20
Diameter stenosis, %	57.6±11.9	59.3±10.0	57.2±11.1	0.30
Post‐PCI
Minimum lumen diameter, mm	2.39±0.39	2.34±0.27	2.42±0.45	0.29
Diameter stenosis, %	14.6±11.1	15.3±10.9	14.1±11.2	0.57
Transient no‐reflow, n (%)	12 (9.6%)	11 (22.0%)	1 (1.3%)	<0.01
Final slow flow, n (%)	5 (4.0%)	5 (10.0%)	0 (0.0%)	0.005
Acute gain, mm	1.36±0.58	1.43±0.48	1.31±0.63	0.27
QFR analysis
μQFR pre‐PCI	0.68±0.16	0.69±0.13	0.68±0.17	0.96
μQFR post‐PCI	0.89±0.09	0.92±0.06	0.87±0.10	0.01
IMR analysis
IMR pre PCI, mm Hg×s/cm	29.8±9.7	34.5±8.1	26.6±9.5	<0.001
IMR post‐PCI, mm Hg×s/cm	33.4±11.5	43.0±10.5*	27.0±6.6	<0.001
ΔIMR, mm Hg×s/cm	3.6±9.3	8.6±9.4	0.4±7.6	<0.001

Values are expressed as mean±SD or n (%). μQFR indicates Murray's law‐based quantitative flow ratio; IMR, index of microvascular resistance; LAD, left anterior descending artery; LCX, left circumflex artery; PCI, percutaneous coronary intervention; PMI, periprocedural myocardial injury; QFR, quantitative flow ratio; and RCA, right coronary artery.

^*Indicates P<0.05 vs IMR pre‐PCI.