#$%^&*AU2007201127B220120209.pdf#####ABSTRACT A pumping system for assisting the circulatory system of a patient, wherein the system includes a rotary flow blood pump by a first cannula connected to a portion of the left side of the heart and a second cannula connected to the aorta and characterised in that the pumping speed of said pump is adjusted in accordance with measurements from a pressure sensor mounted in or on an inner wall of a portion of the left side of the heart.