Baseline characteristics of study population
| Overall | Infarct | Non-ischaemic CM | Myocarditis | Normal | Stress CM | P value | |
| Pt, % (no.) | 100 (215) | 22 (48) | 20 (42) | 32 (68) | 17 (37) | 9.3 (20) | |
| Age, mean, year (SD) | 55 (17) | 63 (12) | 55 (14) | 46 (17) | 58 (17) | 62 (12) | <0.001 |
| Gender (% male) | 51 | 42 | 60 | 63 | 49 | 15 | 0.001 |
| BMI, mean (SD) | 30 (8) | 31 (10) | 31 (9) | 30 (6) | 28 (7) | 29 (7) | 0.5 |
| HTN (%) | 48 | 63 | 52 | 34 | 41 | 65 | 0.01 |
| DM (%) | 10 | 17 | 10 | 6 | 8 | 10 | 0.44 |
| Current smoking (%) | 19 | 15 | 26 | 22 | 16 | 5 | 0.28 |
| Hyperlipidaemia (%) | 40 | 50 | 38 | 24 | 49 | 65 | 0.003 |
| Prev PCI (%) | 8 | 8 | 5 | 3 | 19 | 10 | 0.06 |
| Prev CABG (%) | 2 | 8 | 0 | 0 | 0 | 5 | |
| eGFR (%) | 0.09 | ||||||
| 15–29 mL/min/1.73 m2 | 1 | 2 | 2 | 0 | 0 | 5 | |
| 30–59 mL/min/1.73 m2 | 14 | 13 | 21 | 7 | 19 | 20 | |
| 60–89 mL/min/1.73 m2 | 46 | 58 | 48 | 41 | 35 | 50 | |
| >90 mL/min/1.73 m2 | 38 | 27 | 29 | 51 | 46 | 25 | |
| Mean time from troponin elevation to catheterisation, days (SD) | 1.13 (5) | 0.78 (1) | 0.83 (1) | 1.96 (8) | 0.86 (1) | 0.35 (0.5) | 0.51 |
| Mean time from troponin elevation to cardiac MRI, days (SD) | 3.68 (6) | 3.56 (5) | 3.98 (6) | 3.46 (8) | 4.05 (5) | 3.45 (6) | 0.98 |
| Myocardial bridging present on coronary catheterisation (%) | 7.40 | 8.30 | 5.90 | 7.10 | 11 | 5.00 | 0.90 |
| EF, %, baseline (SD) | 47 (17) | 54 (15) | 34 (18) | 50 (17) | 54 (12) | 43 (15) | <0.001 |
| EF, %, 3 months (SD) | 53 (14) | 48 (15) | 44 (17) | 59 (8) | 58 (8) | 61 (6) | 0.002 |
| EF, %, 6 months (SD) | 52 (15) | 52 (15) | 42 (16) | 58 (6) | 64 (8) | 61 (9) | <0.001 |
| Discharge medications (%) | |||||||
| β-blocker | 66 | 90 | 76 | 50 | 46 | 80 | <0.001 |
| Dual antiplatelet therapy | 18 | 58 | 0 | 1.50 | 14 | 20 | <0.001 |
| ACE/ARB | 54 | 52 | 83 | 43 | 35 | 75 | <0.001 |
| Statin | 53 | 88 | 52 | 29 | 43 | 70 | <0.001 |
ARB, angiotensin-receptor blocker; BMI, body mass index; CABG, coronary artery bypass grafting; CM, cardiomyopathy; DM, diabetes mellitus; EF, ejection fraction; eGFR, estimated glomerular filtration rate; HTN, hypertension; PCI, percutaneous coronary intervention.