Analysis of Myocardial Ischemia Parameters after Coronary Artery Bypass Grafting with Minimal Extracorporeal Circulation and a Novel Microplegia versus Off-Pump Coronary Artery Bypass Grafting
Table 1
Patient characteristics.
Before IPTW
After IPTW
OPCAB ()
Microplegia (n = 148)
Diff.
OPCAB ()
Microplegia ()
Diff.
Age in years, m (SD)
69.3 (10.2)
68.0 (8.7)
-0.143
0.205
68.1 (10.4)
68.2 (9.7)
0.005
0.969
BMI in kg/m2, m (SD)
26.8 (4.0)
27.9 (4.7)
0.253
0.023
27.0 (4.3)
26.9 (5.1)
-0.017
0.890
Ejection fraction in %, m (SD)
53.0 (11.2)
56.3 (10.2)
0.306
0.007
54.4 (10.4)
54.2 (15.4)
-0.016
0.899
EuroSCORE 2, m (SD)
2.3 (2.0)
1.6 (1.6)
-0.383
0.001
1.9 (1.3)
1.8 (3.3)
-0.010
0.938
Female, (%)
33 (18.9)
28 (18.9)
-0.002
0.989
27 (17.9)
23 (18.4)
-0.014
0.914
Diabetes, (%)
57 (32.6)
60 (40.5)
-0.166
0.138
52 (33.9)
42 (33.5)
0.009
0.948
Peripheral artery disease, (%)
45 (25.7)
22 (14.9)
0.272
0.018
32 (21.2)
25 (19.9)
0.033
0.811
Preoperative stroke, (%)
24 (13.7)
11 (7.4)
0.205
0.074
17 (11.4)
11 (8.5)
0.096
0.460
Renal disease, (%)
8 (4.6)
3 (2.0)
0.143
0.221
4 (2.4)
3 (2.3)
0.002
0.987
COPD, (%)
18 (10.3)
17 (11.5)
-0.039
0.730
15 (9.7)
15 (12.1)
-0.077
0.546
Prior myocardial infarction, (%)
75 (42.9)
44 (29.7)
0.276
0.015
60 (39.1)
49 (39.4)
-0.007
0.961
Hypertension, (%)
158 (90.3)
126 (85.1)
0.157
0.160
135 (88.4)
110 (88.2)
0.006
0.964
Hypercholesterolemia, (%)
141 (80.6)
113 (76.4)
0.103
0.357
120 (78.3)
100 (80.0)
-0.043
0.739
NYHA III or IV, (%)
36 (20.6)
23 (15.5)
0.131
0.245
27 (17.9)
22 (17.7)
0.006
0.965
Preoperative atrial fibrillation, (%)
9 (5.1)
9 (6.1)
-0.041
0.714
7 (4.5)
5 (4.4)
0.005
0.969
Current smoker, (%)
31 (17.7)
29 (19.6)
-0.048
0.665
30 (19.8)
28 (22.1)
-0.056
0.689
Diff.: standardized differences. Data are presented as mean and standard deviation or as numbers (%). OPCAB: off-pump coronary artery bypass grafting; COPD: chronic obstructive pulmonary disease; IPTW: inverse probability of treatment weighting.
