Patients with DCM have elevated plasma miR-423-5p levels. The plasma concentration of miR-423-5p was positively correlated with the level of NT-proBNP. Circulating levels of miR-423-5p could be served as a diagnostic biomarker for heart failure caused by DCM. Plasma levels of immunity-associated miR-146a, -155, and -126 were not significantly different between DCM and control groups.

In patients prescribed long-term amiodarone therapy, occurrence of AIT is associated with a 2.7-fold increased risk of MACE. Regular and close biochemical surveillance is thus advisable to identify and treat this high-risk group of patients.

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