Table 1 Baseline demographics and characteristics of coronary artery bypass graft (CABG) patients and healthy volunteers

Demographics

N = 38

N = 25

Age, years (median, IQR)

66 (60–73)

34 (30–43)

Sex, n (% male)

33 (87)

13 (52)

BSA, m² (median, IQR)

1.9 (1.7–2.0)

2.0 (1.8–2.0)

Co-morbidities

 Diabetes, n (%)

21 (55)

 Hypertension, n (%)

37 (97)

 Hypercholesterolaemia, n (%)

33 (87)

Medication

 B-blockers, n (%)

30 (79)

 CCB, n (%)

9 (24)

 ACE-I/ ARB, n (%)

34 (90)

 Antiplatelets, n (%)

37 (97)

Presentation

 Typical chest pain

24 (63)

 Atypical chest pain/dyspnoea

9 (24)

 NSTEACS^a

5 (13)

Coronary artery bypass graft

 Time from CABG, years (median, IQR)

5 (2–11)

 Total number of grafts per patient, n (%)

  Single graft (LIMA to LAD)

1 (3)

  2× grafts

4 (10)

  3× grafts

23 (61)

  4× grafts

10 (26)

 Vein grafts per patient, n (%)

  1×  vein graft

6 (16)

  2× vein grafts

21 (55)

  3× vein grafts

10 (26)

CMR parameters

 LVEDVI, ml/m²

68 ± 12

77 ± 15

 LVMI, g/m²

54 ± 13

52 ± 10

 LVEF, %

62 ± 8

66 ± 4

 Global stress MBF, ml/g/min

1.54 ± 0.47

2.82 ± 0.61

 Global rest MBF, ml/g/min

0.82 ± 0.21

0.90 ± 0.24

 Global MPR

1.94 ± 0.63

3.22 ± 0.63

 LIMA–LAD (or LAD) stress MBF, ml/g/min

1.65 ± 0.54

3.04 ± 0.69

 LIMA–LAD (or LAD) rest MBF, ml/g/min

0.88 ± 0.22

1.04 ± 0.30

 LIMA–LAD (or LAD) MPR

1.92 ± 0.64

3.04 ± 0.65