Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany Institute of Applied Telemedicine, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Georgstr.11 32545, Bad Oeynhausen, Germany hkoertke@hdz-nrw.de. Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany. Institute of Applied Telemedicine, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Georgstr.11 32545, Bad Oeynhausen, Germany. Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany Institute of Applied Telemedicine, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Georgstr.11 32545, Bad Oeynhausen, Germany. Hospital Santa Anna, Catanzaro, Italy. Academic City Hospital, Ludwigshafen, Germany. Mediclin Heart Institute Lahr/Baden, Lahr; University Witten-Herdecke, Faculty of Health, School of Medicine, Germany. Clinic for Cardiac and Vascular Surgery, Christain-Albrechts-University Kiel, Kiel, Germany. Azienda Ospedaliera S. Camillo Forlani, Roma, Italy.