A circulatory assist system for assisting the flow of blood through a patient circulatory system, comprising a cannula assembly (500) for directing blood from a heart of the patient, the cannula assembly (500) comprising a flexible cannula body (502) including a proximal end (504), a distal end (506), and a lumen (508) therebetween. A pump (594) for drawing blood from the heart into the cannula body (502) and dispensing the blood from the cannula body (502) and into the patient circulatory system, the pump (594) further including an inlet (596) and an outlet (598). An outflow cannula (600) configured to fluidicly communicate the outlet (598) and an artery of a patient. An adaptor device (602) configured to fluidicly communicate the inlet (596) and the cannula body (598), the adaptor device (602) including a proximal portion (604), a distal portion (606), and a body (608) therebetween.
