Fig. 2

(Reproduced with permission from Caldas et al. [22])
Ten-second continuous recording of blood pressure and cerebral blood flow velocity from 63-year-old male patient with IABP ratio 1:3, showing removal of the intra-aortic balloon pump at t = 6 s. This subject is representative of the frequent occurrence of cerebral blood flow velocity diastolic values that are negative or near zero following deflation of the balloon