Patient prosthesis mismatch
PPM was defined as an iEOA < 0,85 cm2/m2. An iEOA between 0,85 cm2/m2 and 0,65 cm2/m2 was considered moderate PPM, while an iEOA < 0,65 cm2/m2 was considered severe PPM. PPM calculation was performed using the EOA value provided by the manufacturer for every prosthesis divided by the patient’s body surface area (BSA). Patients with mechanical and biological prostheses were compared according to the presence (iEOA < 0,85 cm2/m2) or absence (iEOA > 0,85 cm2/m2) of PPM.