A percutaneous circulatory support device includes a housing, a cannula coupled to the housing, the cannula having a first portion and a second portion, and wherein the cannula includes at least one slot disposed along at least the first portion of the cannula, the at least one slot configured such that the first portion of the cannula is defined by a first stiffness and a second portion of the cannula is defined by a second stiffness, the first stiffness being different than the second stiffness.