Patient-prosthesis mismatch (PPM) was reported for the first time by Rahimtoola [1] in 1978 and it occurs when the effective orifice area (EOA) indexed for the body surface area (BSA) is less than that of a normal human valve. Several studies using the indexed EOA have shown the negative impact of PPM on clinical outcomes: in fact, it seems to be related with less improvement in symptoms, i.e. ...
