Abstract
THE INTRA-AORTIC BALLOON PUMP (IABP) has evolved as a means of providing mechanical circulatory support in patients with coronary artery disease that has progressed into cardiogenic shock. Using a counter-inflation mechanism, balloon inflation in early diastole augments coronary perfusion pressure, and its deflation at end diastole decreases left ventricular afterload, thus increasing cardiac output at a lower oxygen debt. The prophylactic use of a preoperative IABP in patients with cardiogenic shock undergoing surgical coronary revascularization has been a matter of debate, with some studies showing a benefit,1 others showing no benefit,2 and still others demonstrating harm with its use.
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