Table 1 Baseline characteristics of study patients

Age, yrs

42.7 ± 16.5

Male (N,%)

155 (76)

History of cardiovascular disease (N,%)

4 (2)

Time between symptoms onset and CMR (days)

3 ± 2

Time between CMR and subsequent assessment of LV EF (months)

9.8 ± 6.8

Time between CMR and follow-up (months)

18.9 ± 8.2

Initial clinical score

4.6 ± 1.5

Clinical presentation at acute stage (N,%)

Chest pain - ST and/or T ECG changes - elevated troponin

143 (70)

Chest pain – recent history of viral infection – elevated troponin

22(11)

Chest pain – recent history of viral infection – ST and/or T ECG changes

16(8)

Sustained ventricular arrhythmias, cardiac arrest

12 (6)

Heart failure

10 (5)