Other abnormalities, such as abnormally elevated levels of NT-proBNP, or the presence of AMAs, abnormalities on ECG, and abnormalities on echocardiography were not valuable in our diagnostic flowchart for a positive diagnosis of (peri)myocarditis in patients with newly diagnosed IIM (Fig. 2). The gene discussed is NPPB; the disease is acquired idiopathic inflammatory myopathy.