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Table 3 Baseline characteristics of BIMA patients stratified by use of left versus right IMA to revascularize the LAD (left part of table), and by choice of non-LAD target (RCA vs. circumflex) for the second IMA (right part of table)

From: Lessons learned from the use of 1,977 in-situ bilateral internal mammary arteries: a retrospective study

Variable (% unless otherwise indicated) RIMA-LAD LIMA-LAD pvalue 2nd IMA-Cx 2nd IMA-RCA pvalue
n = 234 n = 1,743 n = 650 n = 1,239
Age (mean years ± SD) 54.1 ± 8.7 55.6 ± 8.5 0.06 55.8 ± 8.4 55.4 ± 8.5 0.31
Female 10.8 11.0 0.9 10.7 11.1 0.88
BMI (mean kg/m2 ± SD) 27.3 ± 3.8 27.1 ± 3.7 0.83 27.3 ± 3.8 27.2 ± 3.6 0.65
Diabetes mellitus 13.8 12.2 0.49 13.7 12.5 0.52
Insulin-dependent 18.5 21.5 1.0 18.7 22.9 0.51
Renal failure 5.1 3.2 0.15 2.1 3.0 0.07
Previous MI 45.9 51.0 0.2 43.7 47.8 0.24
Hypertension 44.9 50.1 0.18 55.2 56.1 0.19
Active smoking 33.2 32.0 0.74 30.4 33.0 0.29
COPD 5.6 6.2 0.88 6.7 5.6 0.46
Peripheral vascular disease 8.2 8.9 0.79 9.9 8.5 0.34
Previous stroke 2.0 3.3 0.39 2.3 3.6 0.13
LVEF ≤ 35% 3.6 3.9 1.0 4.8 3.4 0.15
CHF NYHA class III or IV 19.5 18.0 0.62 15.5 17.3 0.55
Atrial fibrillation 2.6 1.4 0.22 1.5 1.3 0.83
Three-vessel disease 56.1 58.9 0.44 56.8 64.9 0.08
Parsonnet score (mean ± SD) 1.3 ± 0.9 1.4 ± 0.9 0.76 1.4 ± 1.0 1.3 ± 0.9 0.12
EuroSCORE (mean ± SD) 1.6 ± 1.4 1.9 ± 2.8 0.06 2.0 ± 2.9 1.9 ± 2.6 0.44
  1. BIMA bilateral internal mammary artery, CPB Cardiopulmonary bypass, CHF congestive heart failure, COPD chronic obstructive pulmonary disease, IMA internal mammary artery, LVEF left ventricular ejection fraction, MI myocardial infarction, NYHA New York Heart Association, SD standard deviation.