Safety and efficacy of direct Cardiac Shockwave Therapy in patients with ischemic cardiomyopathy undergoing coronary artery bypass grafting (the CAST-HF trial): study protocol for... oleh Leo Pölzl, Felix Nägele, Michael Graber, Jakob Hirsch, Daniela Lobenwein, Martina Mitrovic, Agnes Mayr, Markus Theurl, Michael Schreinlechner, Matthias Pamminger, Christian Dorfmüller, Michael Grimm, Can Gollmann-Tepeköylü, Johannes Holfeld