| 摘要 |
An intravascular bi-directional pump is adapted to be located in the upper aorta, whereby it can assist the left ventricle to eject in the forward direction during systole, so as to off-load the heart, and also pump an adequate amount in the reverse direction, during diastole, to secure coronary flow. The pump may be placed either in the ascending aorta, just distal to the aortic valve leaflets, or in the upper descending aorta. It may be a centrifugal pump, a positive displacement pump or an axial flow pump, and may be mounted in a stent. |
