When is an appropriate time to consider endomyocardial biopsy for non-ischemic cardiomyopathy?

Endomyocardial biopsy is mostly indicated when there is a suspicion for acute myocarditis specially if related with arrhythmias at presentation to r/o giant cell myocarditis, chemotherapy agents related cardiomyopathy specially a tracy clones and immune checkpoint inhibitors, restrictive disease of suspicion of infiltrative disease and other testing are inconclusive. New conduction abnormalities like complete AV block may be another etiology to consider. in 2021 the ESC/japanese society and HFS ...