All laboratory samples taken were analyzed by the biochemistry laboratory, with no reports of any samples being haemolysed. The upper reference limit of cardiac troponin I was >34ng/L with the minimum reporting value of 5ng/L. The cardiac troponin I and C-reactive protein before and after cardioversion in both cohorts are shown in Table 2 with the differences displayed in Figure 1. Repeated measures ANOVA showed a significant decrease in cardiac troponin I following cardioversion in patients without cardiomyopathy (F[1,58]=6.481,p=0.014 ). There was also a significant reduction in c-reactive protein in all participants (F[1,72]=4.313, p=0.04 ) and the cardiomyopathy sub-analysis (F[1,13]=7.602, p=0.017 ) following cardioversion (Figure 1).