Inclusion Criteria [retrospective/prospective]:  Age > 65 years Patients who fulfill at least 3 of the following 4 criteria based on cardiac ultrasound examination, which results in the clinical indication for CMR and scintigraphy Evidence an aortic valve stenosis, defined as opening area according to velocity time integral (VTI) < 2cm2 Hypertrophy of the interventricular septum (IVS) > 11mm Echocardiographically assesed reduced stroke volume index (SVI) (< 35 ml/m2) Reduced ratio of electrical signals of the heart (in the ECG) to the mass of the heart muscle (< 1.6 *10-2 mV/g/m2)  Exclusion Criteria:  Patients who are incapable of giving consent, Age < 65 years patients who have not given their written consent