Retrospective Cohort Study
Copyright ©The Author(s) 2017.
World J Cardiol. Apr 26, 2017; 9(4): 339-346
Published online Apr 26, 2017. doi: 10.4330/wjc.v9.i4.339
Table 1 Clinical and demographic characteristics of the study groups
Characteristics [n (%)]Unmatched groups
Propensity score-matched groups
BIMA (n = 167)LIMA-SVG (n = 263)PBIMA (n = 130)LIMA-SVG (n = 130)P
Age (yr)58.5 ± 10.364.3 ± 9.00.0160.6 ± 9.960.5 ± 10.00.95
Female sex20 (12.0)30 (11.5)0.8816 (12.3)19 (14.6)0.71
Hypertension87 (52.4)163 (61.5)0.0770 (53.8)73 (56.2)0.80
Diabetes mellitus66 (39.5)97 (36.9)0.6153 (40.8)54 (41.5)0.90
Hypercholesterolemia199 (59.6)183 (69.6)0.0479 (60.8)82 (63.1)0.79
History of smoking116 (69.5)173 (65.8)0.5384 (64.6)83 (63.8)0.89
Body mass index (kg/m2)27.6 ± 4.427.4 ± 4.30.8527.6 ± 4.527.3 ± 4.30.56
Other comorbid conditions16 (9.6)31 (11.8)0.5312 (9.2)9 (6.9)0.65
Chronic renal insufficiency COPD228 (16.8)53 (20.5)0.3824 (18.5)23 (17.7)0.87
Peripheral artery disease55 (33.1)111 (42.2)0.0744 (33.8)45 (34.6)0.89
Prior ischemic cardiopathy83 (49.7)154 (58.5)0.1168 (52.3)67 (51.5)0.90
Previous PCI48 (28.7)70 (26.6)0.6636 (28.5)38 (29.2)0.89
EuroSCORE logistic3 (%)7.5 ± 6.98.0 ± 6.00.217.5 ± 7.18.0 ± 6.10.90
Symptoms
Stable angina pectoris50 (30.1)70 (26.6)0.9036 (28.5)36 (27.7)0.90
Acute coronary syndrome71 (42.5)117 (44.5)0.8658 (44.6)55 (42.3)0.90
ambulatory Q wave MI22 (13.2)40 (15.2)0.9518 (13.8)21 (16.2)0.85
silent ischemia33 (13.8)36 (13.7)0.9817 (13.1)18 (13.8)0.90
NYHA class 3-447 (28.1)112 (42.8)0.0345 (34.6)46 (35.4)0.99
Angiographic parameters: Three coronary arteries narrowed (≥ 70%)112 (67.1)165 (62.7)0.3583 (63.8)85 (65.4)0.90
Mitral insufficiency grade ≥ 224 (14.6)46 (18.0)0.1922 (16.9)24 (18.5)0.80
Left ventricular chamber dilatation55 (32.9)100 (38.0)0.2945 (34.6)47 (36.1)0.42
Ejection fraction (%)35.2 ± 5.933.5 ± 5.80.5834.5 ± 6.034.6 ± 5.60.80
Table 2 Procedural characteristics of the study groups
Characteristics [n (%)]BIMA group (n = 167)LIMA-SVG group (n = 263)P
On-pump surgery164 (98.8)245 (93.1)0.80
Mean number of grafts per patient2.5 ± 0.62.5 ± 0.70.91
Complete coronary revascularization117 (70.1)175 (66.5)0.50
Extracorporeal circulation time (min) Median (IQR)79.5 (65.2-100)80.0 (64-100)0.86
Length of stay in ICU (d) Median (IQR)3.1 (2-4)3.2 (2-5)0.11
Length of stay in hospital (d) Median (IQR)8.2 (7-11)9.3 (6-12)0.12
Ventilation time < 24 h160 (95.8)210 (79.9)< 0.01
IABP12 (7.2)24 (9.1)0.80
Vasopressors or inotropic drugs (> 24 h)45 (27.3)107 (41.1)< 0.01
Transfusion (red blood cell units ≥ 3)53 (31.7)123 (46.7)< 0.01
Table 3 In-hospital course
Characteristics [n (%)]BIMA group (n = 167)LIMA-SVG group (n = 263)P
All-cause mortality13 (7.8)27 (10.3)0.49
Cardiovascular mortality8 (4.8)23 (8.7)0.10
Myocardial infarction7 (4.2)10 (3.8)0.80
Redo CABG2 (1.2)2 (0.8)0.64
Stroke2 (1.2)10 (3.8)0.14
Mesenteric ischemia3 (1.8)5 (1.9)0.94
Mediastinitis9 (5.3)6 (2.3)0.11
Cardiac rehabilitation79 (47.3)104 (39.5)0.40
1-yr follow up LVEF44.2% ± 10.1%41.3% ± 10.2%0.81