Observational Study of Prosthetic Tissue Aortic and Mitral Heart Valve

Inclusion Criteria: * The patient requires replacement of the aortic and/or mitral valve (Note: Patients undergoing concomitant procedures, e.g. coronary artery bypass grafting, valve repair, are eligible for this study). * The patient (or legal guardian) has signed a study-specific informed consent, agreeing to the data collection and follow-up requirements. * The patient is of legal age in host country. Exclusion Criteria: * Patient already has a prosthetic valve, other than the aortic and/or mitral valve being replaced at this time. * The patient requires replacement of the tricuspid or pulmonary valve. * The patient is pregnant or nursing. * Patient has active endocarditis. * Patient is actively participating in the study of an investigational drug or device. * Patient has had an acute preoperative neurological event. * The patient is undergoing renal dialysis. * Patient is an intravenous drug abuser, alcohol abuser or prison inmate. * Patient has an inability or unwillingness to return for the required follow-up intervals. * The patient had the SJM Epic Valve implanted during the clinical study but then had the bioprosthesis explanted.