The Impella Recover microaxial left ventricular assist device reduces mortality for postcardiotomy failure: a three-center experience. - Siegenthaler,M.P.; Brehm,K.; Strecker,T.; Hanke,T.; Nötzold,A.; Olschewski,M.; Weyand,M.; Sievers,H.; Beyersdorf,F. (J Thorac Cardiovasc Surg, 2004)