Emergency coronary artery surgery after failed PTCA: myocardial protection with continuous coronary perfusion of beta-blocker-enriched blood. - Hekmat,K.; Clemens,R.M.; Mehlhorn,U.; Geissler,H.J.; Kuhn-Régnier,F.; de Vivie,E.R. (Thorac Cardiovasc Surg, 1998)