Aim of the study is the definition of criteria for a standardized assessment of heart function by 3D echocardiographic procedures. Standardized criteria will be defined to assess aortic valve insufficiency after TAVI and success of mitral valve replacement respectively.

Echocardiography: GE Healthcare Vivid E9

Inclusion Criteria:

• patients with severe symptoms of an aortic stenosis who underwent catheter based implantation of an aortic valve
• patients who are planned to undergo a reconstruction of the mitral valve with the MitraClip System
• Patients who are aged above 18 years and legally competent
• signed informed consent

Exclusion Criteria:

• patients with previous myocard infarction, previous heart surgeries, malignity or valvular abnormities > stage 1
• patients with atrial fibrillation
• pregnant and breast-feeding women
• patients with disturbed central nerve system
• patients with pacemaker, implants, ferrous clamps,insulin pump
• patients with tattoo
• patients with claustrophobia
• patiens with asthma