Fig. 2From: Preserved autoregulation of coronary flow after off-pump coronary artery bypass grafting: retrospective assessment of intraoperative transit time flowmetry with and without intra-aortic balloon counterpulsationPulsatility Index during on IABP (left) and off IABP (right). PI on IABP was significantly higher than that during off IABP (p < .001)Back to article page