[1] Univ Bern, Bern Univ Hosp, Inselspital, Dept Cardiovasc Surg, Freiburgstr, CH-3010 Bern, Switzerland
[2] Univ Bern, Bern Univ Hosp, Inselspital, Dept Intens Care Med, Freiburgstr, CH-3010 Bern, Switzerland
[3] Univ Bern, Bern Univ Hosp, Inselspital, Dept Cardiol, Freiburgstr, CH-3010 Bern, Switzerland
[4] German Heart Ctr, Dept Cardiothorac & Vasc Surg, Berlin, Germany
[5] DZHK German Ctr Cardiovasc Res, Partner Site, Augustenburger Pl 1, D-13353 Berlin, Germany
[6] Univ Bern, Bern Univ Hosp, Inselspital, Dept Anaesthesiol & Pain Med, Freiburgstr, CH-3010 Bern, Switzerland