[1] Charles Univ Prague, Fac Med 1, Dept Cardiovasc Med, Dept Med 2, Prague, Czech Republic
[2] Gen Univ Hosp, Prague, Czech Republic
[3] Charles Univ Prague, Fac Med 1, Dept Cardiovasc Surg, Surg Dept 2, Prague, Czech Republic
[4] Charles Univ Prague, Fac Med 2, Cardiovasc Surg Dept, Prague, Czech Republic
[5] Motol Univ Hosp, Prague, Czech Republic
[6] Charles Univ Prague, Fac Med 1, Dept Anaesthesiol Resuscitat & Intens Med, Prague, Czech Republic