1. From Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Switzerland (K.H., R.M., H.A.); Division of Cardiovascular Surgery, University Hospital Zurich, University of Zurich, Switzerland (M.T., F.M., T.H.); Department of Cardiology, University Hospital Zurich, University of Zurich, Switzerland (R.M.); and Institute for Biomedical Engineering, University and ETH Zurich, Switzerland (R.M.).