Inclusion Criteria:  Age ≥ 60 years Symptomatic heart failure (NYHA II-IV) with LVEF ≥40% Increased LV wall thickness (≥12mm end-diastolic) NT-proBNP ≥1000pg/mL Elevated hs-troponin T ≥14ng/L  Exclusion Criteria:  Contraindications for CMR Acute myocarditis Acute myocardial infarction <1 month Severe aortic stenosis and RAISE score < 2 points