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Keywords: Phospholamban; Eplerenone; Fibrosis; Cardiomyopathy; Heart failure; Randomized clinical trial EN Phospholamban Eplerenone Fibrosis Cardiomyopathy Heart failure Randomized clinical trial 4284 4287 4 10/25/23 20231021 NES 231021 Introduction Phospholamban ( I PLN i ; p.Arg14del) cardiomyopathy is an inherited disease caused by the pathogenic p.Arg14del variant in the I PLN i gene. The phospholamban p.(Arg14del) pathogenic variant leads to cardiomyopathy with heart failure and is unresponsive to standard heart failure therapy. Future research into I PLN i p.Arg14del cardiomyopathy disease progression or modification - and more broadly, research into asymptomatic carriers of pathogenic variations associated with genetic cardiomyopathies - may be better designed using the knowledge obtained in this study. Phospholamban R14del mutation in patients diagnosed with dilated cardiomyopathy or arrhythmogenic right ventricular cardiomyopathy: evidence supporting the concept of arrhythmogenic cardiomyopathy. [Extracted from the article]