“…In stark contrast to these results are studies that delineate viral and non-viral lymphocytic myocarditis etiologies. It has become increasingly clear that immunosuppressive treatments for viral myocarditis are not beneficial (Chen, Wang, Wu, & Liu, 2013), in contrast a retrospective study conducted by Frustaci and colleagues observed that a six month prednisone-azathioprine treatment resulted in improved left ventricle ejection fraction in the subset of patients with myocarditis characterized by a lack of viral genome in the myocardium and presence of cardiac auto-antibodies (Frustaci, et al, 2003). The group followed up this research in a randomized double-blind placebo-controlled study.…”