[1] Med Fac, Dept Anaesthesiol & Intens Care Med, Kerpener Str 62, D-50937 Cologne, Germany
[2] Univ Hosp Cologne, Kerpener Str 62, D-50937 Cologne, Germany
[3] Univ Amsterdam, Amsterdam UMC, Acad Med Ctr, Dept Cardiol,Heart Ctr, Amsterdam, Netherlands
[4] Netherlands Heart Inst, Utrecht, Netherlands
[5] Maggiore Hosp, Dept Anaesthesia Intens Care & EMS, Bologna, Italy
[6] Antwerp Univ Hosp, Emergency Dept, Edegem, Belgium
[7] Univ Antwerp, Edegem, Belgium
[8] Univ Warwick, Warwick Med Sch, Warwick Clin Trials Unit, Gibbet Hill, Coventry, W Midlands, England