Background
During the last years, the concept of frailty has become increasingly
familiar in many surgical specialties, including cardiac surgery. One of
the main characteristics of frailty is its potentially reversible
nature. With the aim of reducing the incidence of complications after
surgery, efforts are being made to preoperatively decrease the level of
frailty, however, the effect that the surgery itself may have in the
postoperative frailty status is still unknown.