 Evaluation: All patients will be evaluated according to current standards for patients with NICM. Evaluation will include 24h-Holter, echocardiography, coronary angiogram and contrast-enhanced MRI CE-MRI. If CE-MRI is performed in another hospital, additional recordings will be performed in our hospital. Additionally, blood samples arterial, cardiac venous and peripheral venous for collagen turnover markers will be taken from all patients. 123-iodine metaiodobenzylguanidine 123-I MIBG imaging, electrophysiologic study and endomyocardial biopsy will be performed in group A and B. Intra-operative biopsy will be performed in group B and C. 