title: Left ventricular function before and following double valve replacement by Björk-Shiley prostheses.
mesh_terms: D000328:Adult; D000368:Aged; D000792:Angiography; D001021:Aortic Valve; D005260:Female; D006349:Heart Valve Diseases / Q000503:physiopathology / Q000601:surgery; D006350:Heart Valve Prosthesis; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D011184:Postoperative Period; D011300:Preoperative Care; D013514:Surgical Procedures, Operative / Q000401:mortality