The Effect of Preoperative Intra-aortic Balloon Pump Support in Patients with Coronary Artery Disease, Poor Left-Ventricular Function (LVEF < 40%), and Hypertensive LV Hypertrophy - Christenson, J T; Simonet, F; Badel, P; Schmuziger, M (The Thoracic and Cardiovascular Surgeon, 1997)