[1] Med Univ Vienna, Dept Internal Med 2, Div Cardiol, Vienna, Austria
[2] S Elia Hosp, Dept Cardiol, Caltanissetta, Italy
[3] Clin Favoriten, Dept Internal Med 5, Div Cardiol, Vienna, Austria
[4] Univ Hosp Krems, Dept Internal Med 1, Div Cardiol, Krems An Der Donau, Austria
[5] Karl Landsteiner Private Univ Hlth Sci, Krems An Der Donau, Austria
[6] Med Univ Vienna, Dept Surg, Div Thorac Surg, Vienna, Austria
[7] Med Univ Vienna, Dept Internal Med 2, Div Cardiol, Wahringer Gurtel 18-20, A-1090 Vienna, Austria