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 (The Thoracic and Cardiovascular Surgeon, 1998)