Coronary Disease/complications; Subclavian Steal Syndrome/complications; Aged; Angina Pectoris/complications; Angina Pectoris/physiopathology; Angioplasty, Balloon, Coronary; Blood Vessel Prosthesis Implantation; Cardiac Catheterization; Coronary Angiography; Coronary Artery Bypass; Coronary Circulation/physiology; Coronary Disease/mortality; Coronary Disease/physiopathology; Female; Follow-Up Studies; Humans; Incidence; Male; Mammary Arteries/diagnostic imaging; Mammary Arteries/transplantation; Middle Aged; Recurrence; Risk Factors; Stents; Subclavian Artery/diagnostic imaging; Subclavian Artery/transplantation; Subclavian Steal Syndrome/mortality; Subclavian Steal Syndrome/physiopathology; Survival Analysis; Tomography, Emission-Computed, Single-Photon; Treatment Outcome; Vascular Patency/physiology