Valve replacement surgery replaces one or more faulty heart valves with an artificial heart valve. The document discusses the different types of heart valves, when valve replacement is needed, and the procedures for replacing the aortic, mitral, and tricuspid valves. It outlines the role of physiotherapy in the pre-operative and post-operative care of patients, including a daily exercise protocol from the day of surgery through discharge and a home exercise program. The goal is to minimize deconditioning and enhance cardiovascular and musculoskeletal function through breathing exercises, range of motion, ambulation, and activities of daily living.